8
8.0
Apr 27, 2017
04/17
Apr 27, 2017
by
Qi-Fang Lü; Fei Huang; Yu-Bing Dong; Peng-Nian Shen; Zong-Ye Zhang
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The structure of $d^*(2380)$ is re-studied with the single cluster structure in the chiral SU(3) quark model which has successfully been employed to explain the $N-N$ scattering data and the binding energy of deuteron. The binding behavior of such a six quark system is solved by using a variational method. The trial wave function is chosen to be a combination of a basic spherical symmetric component of $[(0s)^6]_{orb}$ in the orbital space with $0\hbar\omega$ excitation and an inner structural...
Topics: Nuclear Theory, Nuclear Experiment, High Energy Physics - Phenomenology
Source: http://arxiv.org/abs/1704.08503
10
10.0
Apr 26, 2017
04/17
Apr 26, 2017
by
Zi-Wei Lin
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eye 10
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For relativistic heavy ion collisions, the Bjorken formula is very useful for the estimation of the initial energy density once an initial time $\tau_0$ is specified. However, the formula is only valid when $\tau_0$ is much bigger than the finite time it takes for the two nuclei to cross each other, therefore it cannot be trusted at low energies, below $\sqrt{s_{_{\rm NN}}} \sim 50$ GeV for central Au+Au collisions. In this study we extend the Bjorken formula by including a time profile for the...
Topics: Nuclear Theory, Nuclear Experiment
Source: http://arxiv.org/abs/1704.08418
3
3.0
Apr 26, 2017
04/17
Apr 26, 2017
by
M. Hassanvand; Y. Akaishi; T. Yamazaki
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Possible existence of deeply bound kaonic nuclear systems was proposed Akaishi and Yamazaki (2002} more than a decade ago, based on an ansatz that the Lambda* = Lambda(1405) mass is 1405 MeV/c2, where the Lambda* is a Kbar-N quasi-bound state decaying to Sigma-pi. Recently, a large number of data on photo-production of Lambda(1405) in the gamma p to K+ pi{0+-} Sigma{0-+} reaction were provided by the CLAS collaboration Moriya et al.(2013}, and double-pole structure of the Lambda* has been...
Topics: Nuclear Theory, Nuclear Experiment
Source: http://arxiv.org/abs/1704.08571
8
8.0
Apr 25, 2017
04/17
Apr 25, 2017
by
Steffen A. Bass; Jonah E. Bernhard; J. Scott Moreland
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The quality of data taken at RHIC and LHC as well as the success and sophistication of computational models for the description of ultra-relativistic heavy-ion collisions have advanced to a level that allows for the quantitative extraction of the transport properties of the Quark-Gluon-Plasma. However, the complexity of this task as well as the computational effort associated with it can only be overcome by developing novel methodologies: in this paper we outline such an analysis based on...
Topics: Nuclear Theory, Nuclear Experiment, High Energy Physics - Phenomenology
Source: http://arxiv.org/abs/1704.07671
6
6.0
Apr 25, 2017
04/17
Apr 25, 2017
by
Ralf Rapp; Xiaojian Du
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The objective of this paper is to assess the current theoretical understanding of the extensive set of quarkonium observables (for both charmonia and bottomonia) that have been attained in ultrarelativistic heavy-ion collisions over two orders of magnitude in center-of-mass energy. We briefly lay out and compare the currently employed theoretical frameworks and their underlying transport coefficients, and then analyze excitation functions of quarkonium yields to characterize the nature of the...
Topics: Nuclear Theory, Nuclear Experiment, High Energy Physics - Phenomenology
Source: http://arxiv.org/abs/1704.07923
3
3.0
Apr 25, 2017
04/17
Apr 25, 2017
by
S. V. Bekh; A. P. Kobushkin; E. A. Strokovsky
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We calculate momentum distributions of neutrons and protons in $^3$He in the framework of a model which includes 3N interactions together with 2N interactions. It is shown that contribution of 3N interactions becomes essential in comparison with contribution coming from 2N interaction for internal momentum in $^3$He $k>$~250~MeV/c. We also compare calculated momentum distribution of protons with so-called empirical momentum distribution of protons extracted from A$(^3\mathrm{He},p)$ breakup...
Topics: Nuclear Theory, Nuclear Experiment
Source: http://arxiv.org/abs/1704.07662
7
7.0
Apr 25, 2017
04/17
Apr 25, 2017
by
Nils Van Dessel; Natalie Jachowicz; Raúl González-Jiménez; Vishvas Pandey; Tom Van Cuyck
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eye 7
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Background: 12C has been and is still widely used in neutrino-nucleus scattering and oscillation experiments. More recently, 40Ar has emerged as an important nuclear target for current and future experiments. Liquid argon time projection chambers (LArTPCs) possess various advantages in measuring electroweak neutrino-nucleus cross sections. Concurrent theoretical research is an evident necessity. Purpose: 40Ar is larger than 12C, and one expects nuclear effects to play a bigger role in...
Topics: Nuclear Theory, High Energy Physics - Experiment, High Energy Physics - Phenomenology, Nuclear...
Source: http://arxiv.org/abs/1704.07817
4
4.0
Apr 24, 2017
04/17
Apr 24, 2017
by
Long Ma
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We report the preliminary results of the azimuthal correlations between $D^{*\pm}$ mesons and charged hadrons ($D^{*}$-h) measured by the STAR experiment in proton+proton collisions at $\sqrt{s}$ = 500 GeV. Results at mid-rapidity in the transverse-momentum range 8 $\le$ $p^{D^{*}}_{T}$ $\le$ 20 GeV/$c$ are compared with light hadron triggered correlations (h-h) and PYTHIA predictions. We also present an exploratory study of azimuthal correlations between $D^{*+}$ and $D^{*-}$ mesons in p+p...
Topic: Nuclear Experiment
Source: http://arxiv.org/abs/1704.07098
5
5.0
Apr 24, 2017
04/17
Apr 24, 2017
by
M. Thoennessen
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The 2016 update of the discovery of nuclide project is presented. Only twelve new nuclides were observed for the first time in 2016. A large number of isotopes is still only published in conference proceedings or internal reports. No changes to earlier assignments were made.
Topic: Nuclear Experiment
Source: http://arxiv.org/abs/1704.07169
6
6.0
Apr 24, 2017
04/17
Apr 24, 2017
by
You Zhou
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eye 6
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The second and the third order anisotropic flow, $V_{2}$ and $V_3$, are determined by the corresponding initial spatial anisotropy coefficients, $\varepsilon_{2}$ and $\varepsilon_{3}$, in the initial density distribution. On the contrary, the higher order anisotropic flow $V_n$ ($n > 3$), in addition to their dependence on the same order initial anisotropy coefficient $\varepsilon_{n}$, have a significant contribution from lower order initial anisotropy coefficients, which leads to...
Topics: Nuclear Theory, Nuclear Experiment
Source: http://arxiv.org/abs/1704.07070
4
4.0
Apr 23, 2017
04/17
Apr 23, 2017
by
J. D. Brandenburg
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In this contribution we report $e^{+}e^{-}$ spectra with various invariant mass and p$_{T}$ differentials in Au$+$Au collisions at $\sqrt{s_{NN}}$=200 GeV and U$+$U collisions at $\sqrt{s_{NN}}$=193 GeV. The structure of the t ($t\approx p^2_{\mathrm{T}}$) distributions of these mass regions will be shown and compared with the same distributions in ultra-peripheral collisions. Additionally, this contribution discusses first measurements of $\mu^{+}\mu^{-}$ invariant mass spectra from STAR's...
Topic: Nuclear Experiment
Source: http://arxiv.org/abs/1704.06890
6
6.0
Apr 23, 2017
04/17
Apr 23, 2017
by
S. X. Nakamura; H. Kamano; T. Ishikawa
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We develop a reaction model for $\eta$ photoproduction off the deuteron ($\gamma d\to\eta pn$), and study the reaction at a special kinematics, where the photon beam energy is $\sim 0.94$ GeV and the scattered proton is detected at $\sim 0^\circ$, for the purpose of determining the $\eta$-nucleon scattering length ($a_{\eta N}$) and effective range ($r_{\eta N}$). In this kinematics, the $\eta$-nucleon elastic rescattering is significantly enhanced while other background mechanisms being...
Topics: Nuclear Theory, High Energy Physics - Experiment, High Energy Physics - Phenomenology, Nuclear...
Source: http://arxiv.org/abs/1704.07029
4
4.0
Apr 23, 2017
04/17
Apr 23, 2017
by
L. T. Imasheva; B. S. Ishkhanov; S. V. Sidorov; M. E. Stepanov; T. Yu. Tretyakova
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The ground state multiplet structure for nuclei over the wide range of mass number $A$ was calculated in $\delta$-approximation and different mass relations for pairing energy was analysed in this work. Correlation between the calculated multiplet structure and experimental data offer a guideline in deciding between mass relations for nucleon pairing.
Topics: Nuclear Theory, Nuclear Experiment
Source: http://arxiv.org/abs/1704.06895
5
5.0
Apr 22, 2017
04/17
Apr 22, 2017
by
Koichi Hattori; Yi Yin
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We discuss new transport phenomena in the presence of both a strong magnetic field and a vortex field. Their interplay induces a charge distribution and a current along the magnetic field. We show that the associated transport coefficients can be obtained from a simple analysis of the single-particle distribution functions and also from the Kubo formula calculation. The consistent results from these analyses suggest that the transport coefficients are tied to the chiral anomaly in the (1+1)...
Topics: Nuclear Theory, Nuclear Experiment, High Energy Physics - Phenomenology
Source: http://arxiv.org/abs/1704.06839
5
5.0
Apr 22, 2017
04/17
Apr 22, 2017
by
I. Coarasa; J. Amaré; S. Cebrián; C. Cuesta; E. García; M. Martínez; M. A. Oliván; Y. Ortigoza; A. Ortiz de Solórzano; J. Puimedón; M. L. Sarsa; J. A. Villar; P. Villar
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The annual modulation measured by the DAMA/LIBRA experiment can be explained by the interaction of dark matter WIMPs in NaI(Tl) scintillator detectors. Other experiments, with different targets or techniques, exclude the region of parameters singled out by DAMA/LIBRA, but the comparison of their results relies on several hypotheses regarding the dark matter model. ANAIS-112 is a dark matter search with 112.5 kg of NaI(Tl) scintillators under commissioning at the Canfranc Underground Laboratory...
Topics: Instrumentation and Detectors, Physics, Nuclear Experiment, Instrumentation and Methods for...
Source: http://arxiv.org/abs/1704.06861
4
4.0
Apr 21, 2017
04/17
Apr 21, 2017
by
J. Marton; K. Piscicchia; C. Curceanu; M. Cargnelli; R. Del Grande; L. Fabbietti; G. Mandaglio; M. Martini; P. Moskal; A. Scordo; D. Sirghi; M. Skurzok; I. Tucakovic; O. Vazquez Doce; S. Wycech; J. Zmeskal
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The aim of AMADEUS is to provide unprecedented experimental information on K$^-$ absorption in light nuclear targets, to face major open problems in hadron nuclear physics in the strangeness sector, namely the nature of the $\Lambda$(1405), strongly related to the possible existence of kaonic nuclear clusters, kaons and hyperon scattering cross sections on nucleons and nuclei. These issues are fundamental for a better understanding of the non-perturbative QCD in the strangeness sector. AMADEUS...
Topic: Nuclear Experiment
Source: http://arxiv.org/abs/1704.06562
6
6.0
Apr 21, 2017
04/17
Apr 21, 2017
by
Sang Eon Park on behalf of the CMS Collaboration
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In nucleus-nucleus collisions, the linear dependence found for the elliptic flow harmonic of both positive or negative charged particles as a function of event charge asymmetry is predicted by the phenomenon known as the Chiral Magnetic Wave (CMW) due to its induced electric quadrupole moment. Here, the event charge asymmetry $A_{\rm ch}$ is defined as $\frac{N_{+}-N_{-}}{N_{+}+N_{-}}$, where $N_{+}$ and $N_{-}$ are the number of positive and negative charged particles, respectively. However,...
Topic: Nuclear Experiment
Source: http://arxiv.org/abs/1704.06712
7
7.0
Apr 21, 2017
04/17
Apr 21, 2017
by
G. Prior
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The main physics goal of the SNO+ experiment is the search for neutrinoless double-beta decay (0$\nu\beta\beta$), a rare process which if detected, will prove the Majorana nature of neutrinos and provide information on the absolute scale of the neutrino mass. Additional physics goals include the study of solar neutrinos, anti-neutrinos from nuclear reactors and the Earth's natural radioactivity as well as Supernovae neutrinos. Located in the SNOLAB (Canada) deep underground laboratory, it will...
Topics: Physics, High Energy Physics - Experiment, Nuclear Experiment, Instrumentation and Detectors
Source: http://arxiv.org/abs/1704.06647
5
5.0
Apr 21, 2017
04/17
Apr 21, 2017
by
Raditya Utama; Jorge Piekarewicz
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Exotic nuclei, particularly those near the driplines, are at the core of one of the fundamental questions driving nuclear structure and astrophysics today: what are the limits of nuclear binding? Exotic nuclei play a critical role in both informing theoretical models as well as in our understanding of the origin of the heavy elements. Our purpose is to refine existing mass models through the training of an artificial neural network that will mitigate the large model discrepancies far away from...
Topics: Nuclear Theory, Solar and Stellar Astrophysics, Nuclear Experiment, Astrophysics
Source: http://arxiv.org/abs/1704.06632
15
15
Apr 21, 2017
04/17
Apr 21, 2017
by
Li Yan
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eye 15
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This contribution presents a theoretical overview of hydrodynamic modelling of heavy-ion collisions, with highlights on some recent developments. In particular, the formulation of anisotropic hydrodynamics, the role of hydrodynamic fluctuations, and the non-linear coupling of flow coefficients will be discussed.
Topics: Nuclear Theory, Nuclear Experiment, High Energy Physics - Phenomenology
Source: http://arxiv.org/abs/1704.06643
8
8.0
Apr 20, 2017
04/17
Apr 20, 2017
by
Kathryn Meehan; for the STAR Collaboration
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We present results from STAR's first dedicated fixed-target run conducted in 2015 with Au + Au collisions at sqrt(s_NN) = 4.5 GeV. Directed flow of protons and lambdas, elliptic flow of identified hadrons, HBT radii, as well as pion, K^0_s, and Lambda spectra are compared with previous results from the AGS. These results demonstrate that STAR has good event reconstruction and particle identification capabilities in the fixed-target configuration. The implications of these results on future STAR...
Topic: Nuclear Experiment
Source: http://arxiv.org/abs/1704.06342
3
3.0
Apr 20, 2017
04/17
Apr 20, 2017
by
Patrick Huck
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Enabled by the addition of a TOF detector system in 2010, the first phase of the Beam Energy Scan (BES-I) at RHIC allows STAR to conduct an unprecedented energy-dependent study of dielectron production within a homogeneous experimental environment, and hence close the wide gap in the QCD phase diagram between SPS and top RHIC energies. This thesis concentrates on the understanding of the LMR enhancement regarding its $M_{ee}$, $p_{T}$ and energy dependence. It studies dielectron production in...
Topics: Nuclear Experiment, High Energy Physics - Experiment
Source: http://arxiv.org/abs/1704.06338
6
6.0
Apr 20, 2017
04/17
Apr 20, 2017
by
Takahito Todoroki; for the STAR Collaboration
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We present the first results from the STAR MTD of mid-rapidity charmonium measurements via the di-muon decay channel in p$+$p, p$+$Au, and Au$+$Au collisions at $\sqrt{s_{_{\rm NN}}}=200$~GeV at RHIC. The inclusive $J/\psi$ production cross section in p$+$p collisions can be described by the Non-Relativistic QCD (NRQCD) formalism coupled with the color glass condensate effective theory (CGC) at low transverse momentum ($p_T$) and next-to-leading order NRQCD at high $p_T$. The nuclear...
Topic: Nuclear Experiment
Source: http://arxiv.org/abs/1704.06251
5
5.0
Apr 20, 2017
04/17
Apr 20, 2017
by
V. Sulkosky; G. Jin; E. Long; Y. W. Zhang; M. Mihovilovic; A. Kelleher; B. Anderson; D. W. Higinbotham; S. Sirca; K. Allada; J. R. M. Annand; T. Averett; W. Bertozzi; W. Boeglin; P. Bradshaw; A. Camsonne; M. Canan; G. D. Cates; C. Chen; J. -P. Chen; E. Chudakov; R. De Leo; X. Deng; A. Deur; C. Dutta; L. El Fassi; D. Flay; S. Frullani; F. Garibaldi; H. Gao; S. Gilad; R. Gilman; O. Glamazdin; S. Golge; J. Gomez; J. -O. Hansen; T. Holmstrom; J. Huang; H. Ibrahim; C. W. de Jager; E. Jensen; X....
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$[Background]$ Measurements of the neutron charge distribution are made difficult by the fact that, with no net charge, the neutron electric form factor, $G^n_E$, is generally much smaller than the magnetic form factor, $G^n_M$. In addition, measurements of these form factors must use nuclear targets which requires accurately accounting for nuclear effects. $[Method]$ The inclusive quasi-elastic reaction $^3\overrightarrow{\rm{He}}(\overrightarrow{e},e')$ was measured at Jefferson Lab. The...
Topic: Nuclear Experiment
Source: http://arxiv.org/abs/1704.06253
9
9.0
Apr 20, 2017
04/17
Apr 20, 2017
by
Nicolò Jacazio; for the ALICE Collaboration
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eye 9
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In late 2015, the ALICE collaboration recorded data from Pb--Pb collisions at the unprecedented energy of \sqrt{s_{\rm NN}}~5.02~TeV. The transverse-momentum ($p_{\rm T}$) spectra of pions, kaons and protons are presented. The evolution of the particle ratios as a function of collision energy and centrality is discussed. The ratio between $p_{\rm T}$-integrated particle yields are measured and compared to different collision energies as well as smaller collision systems. For the study of energy...
Topic: Nuclear Experiment
Source: http://arxiv.org/abs/1704.06030
4
4.0
Apr 20, 2017
04/17
Apr 20, 2017
by
Mohammad Saleh
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eye 4
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Azimuthally differential femtoscopic measurements, being sensitive to spatio-temporal characteristics of the source as well as to the collective velocity fields at freeze-out, provide very important information on the nature and dynamics of the system evolution. While the HBT radii modulations relative to the second harmonic event plane reflect mostly the spatial geometry of the source, the third harmonic results are mostly defined by the velocity fields. Radii variations with respect to the...
Topics: High Energy Physics - Experiment, Nuclear Experiment
Source: http://arxiv.org/abs/1704.06206
5
5.0
Apr 19, 2017
04/17
Apr 19, 2017
by
V. I. Komarov
texts
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Proton-proton collisions are considered to find favourable conditions for searching for the transition of a baryon pair state to a hexa-quark confinement state $(3q)+(3q)\rightarrow(6q)_\mathrm{cnf}$. It is admitted that central $pp$ collisions in a definite range of the initial energy can lead to creation of an intermediate compound system where the hexa-quark dibaryon can be formed. Criteria for selection of central collision events and for manifestation of the quark-structure dibaryon...
Topics: Nuclear Theory, Nuclear Experiment
Source: http://arxiv.org/abs/1704.06161
4
4.0
Apr 19, 2017
04/17
Apr 19, 2017
by
Sayantan Sharma; for Bielefeld-BNL-CCNU collaboration
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We present results for the QCD Equation of State at non-zero chemical potentials corresponding to the conserved charges in QCD using Taylor expansion upto sixth order in the baryon number, electric charge and strangeness chemical potentials. The latter two are constrained by the strangeness neutrality and a fixed electric charge to baryon number ratio. In our calculations, we use the Highly Improved Staggered Quarks (HISQ) discretization scheme at physical quark masses and at different values...
Topics: Nuclear Theory, Nuclear Experiment, High Energy Physics - Lattice, High Energy Physics -...
Source: http://arxiv.org/abs/1704.05969
4
4.0
Apr 19, 2017
04/17
Apr 19, 2017
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David d'Enterria; L. Apolinario; N. Armesto; A. Dainese; J. Jowett; J. P. Lansberg; S. Masciocchi; G. Milhano; C. Roland; C. A. Salgado; M. Schaumann; M. van Leeuwen; U. A. Wiedemann
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The unique physics opportunities accessible with nuclear collisions at the CERN Future Circular Collider (FCC) are summarized. Lead-lead (PbPb) and proton-lead (pPb) collisions at $\sqrt{s_{NN}}$ = 39 and 63 TeV respectively with $\mathcal{L}_{int}$ = 33 nb$^{-1}$ and 8 pb$^{-1}$ monthly integrated luminosities, will provide unprecedented experimental conditions to study quark-gluon matter at temperatures ${\cal O}$(1 GeV). The following topics are succinctly discussed: (i) charm-quark...
Topics: Nuclear Theory, High Energy Physics - Experiment, High Energy Physics - Phenomenology, Nuclear...
Source: http://arxiv.org/abs/1704.05891
5
5.0
Apr 18, 2017
04/17
Apr 18, 2017
by
D. Caffarri for the ALICE Collaboration
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The characterization of the jet substructure can give insight into the microscopic nature of the modification induced on high-momentum partons by the Quark-Gluon Plasma that is formed in ultra-relativistic heavy-ion collisions. Jet shapes allow us to study the modification of parton to jet fragmentation and virtuality, probing jet energy redistribution, intra-jet broadening or collimation and possible flavour hierarchy. Results of a selected set of jet shapes will be presented for...
Topic: Nuclear Experiment
Source: http://arxiv.org/abs/1704.05230
3
3.0
Apr 18, 2017
04/17
Apr 18, 2017
by
Anar Rustamov
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First experimental results are presented on event-by-event net-proton fluctuation measurements in Pb- Pb collisions at $\sqrt{s_{NN}}$ = 2.76 TeV, recorded by the ALICE detector at the CERN LHC. The ALICE detector is well suited for such studies due to its excellent particle identification capabilities and large acceptance, which is crucial for fluctuation analysis. The studies are focussed on second order cumulants, but the analysis technique used is more general and will be applied, in the...
Topic: Nuclear Experiment
Source: http://arxiv.org/abs/1704.05329
6
6.0
Apr 18, 2017
04/17
Apr 18, 2017
by
Tetsuo Hatsuda; Kenji Morita; Akira Ohnishi; Kenji Sasaki
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eye 6
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On the basis of the $p\Xi^-$ interaction extracted from (2+1)-flavor lattice QCD simulations at the physical point, the momentum correlation of $p$ and $\Xi^-$ produced in relativistic heavy ion collisions is evaluated. $C_{\rm SL}(Q)$ defined by a ratio of the momentum correlations between the systems with different source sizes is shown to be largely enhanced at low momentum due to the strong attraction between $p$ and $\Xi^-$ in the $I=J=0$ channel. Thus, measuring this ratio at RHIC and LHC...
Topics: Nuclear Theory, Nuclear Experiment, High Energy Physics - Lattice
Source: http://arxiv.org/abs/1704.05225
5
5.0
Apr 17, 2017
04/17
Apr 17, 2017
by
Jacquelyn Noronha-Hostler
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The nearly perfect fluid-like nature of the Quark Gluon Plasma may be understood through two key experimental signatures: collective flow and jet suppression. Event-by-event relativistic viscous hydrodynamics (with an extremely small shear viscosity to entropy density ratio) has been very successful at describing collective flow observables for the last 7 years. More recently, the effects of event-by-event fluctuations have been studied in the context of high $p_T$ particles that lose energy as...
Topics: Nuclear Theory, Nuclear Experiment, High Energy Physics - Phenomenology
Source: http://arxiv.org/abs/1704.05118
4
4.0
Apr 17, 2017
04/17
Apr 17, 2017
by
Gao-Chan Yong; Yuan Gao; Gao-Feng Wei; Wei Zuo
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The nuclear symmetry energy around or below saturation density has been extensively studied and roughly pinned down, while its behavior at suprasaturation densities is rather uncertain. Related experimental studies are being carried out or planned at facilities that offer radioactive beams worldwide. Especially, $\pi$ measurements in medium nuclei $^{132}$Sn+$^{124}$Sn collisions at 300 or 200 MeV/nucleon incident beam energies are ongoing at Radioactive Isotope Beam Facility (RIBF) in...
Topics: Nuclear Theory, Nuclear Experiment
Source: http://arxiv.org/abs/1704.05166
4
4.0
Apr 17, 2017
04/17
Apr 17, 2017
by
Fernando G. Gardim; Frederique Grassi; Matthew Luzum; Jacquelyn Noronha-Hostler
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eye 4
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Correlations of different azimuthal flow harmonics $v_n$ and symmetry planes $\Psi_n$ can add constraints to theoretical models, and probe aspects of the system that are independent of the traditional single-harmonic measurements. Using NeXSPheRIO, a hydrodynamical model which has accurately reproduced a large set of single-harmonic correlations at RHIC, we make predictions of these new observables for 200 A GeV Au+Au Collisions, providing an important baseline for comparison to correlations of...
Topics: Nuclear Theory, Nuclear Experiment, High Energy Physics - Phenomenology
Source: http://arxiv.org/abs/1704.04983
4
4.0
Apr 17, 2017
04/17
Apr 17, 2017
by
EXO-200 Collaboration; :; J. B. Albert; G. Anton; I. Badhrees; P. S. Barbeau; R. Bayerlein; D. Beck; V. Belov; M. Breidenbach; T. Brunner; G. F. Cao; W. R. Cen; C. Chambers; B. Cleveland; M. Coon; A. Craycraft; W. Cree; T. Daniels; M. Danilov; S. J. Daugherty; J. Daughhetee; J. Davis; S. Delaquis; A. Der Mesrobian-Kabakian; R. DeVoe; T. Didberidze; J. Dilling; A. Dolgolenko; M. J. Dolinski; W. Fairbank; J. Farine; S. Feyzbakhsh; P. Fierlinger; D. Fudenberg; R. Gornea; K. Graham; G. Gratta; C....
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Searches for double beta decay of $^{134}\text{Xe}$ were performed with EXO-200, a single-phase liquid xenon detector designed to search for neutrinoless double beta decay of $^{136}\text{Xe}$. Using an exposure of $29.6\text{ kg}\!\cdot\!\text{yr}$, the lower limits of $\text{T}_{1/2}^{2\nu\beta\!\beta}>8.7\cdot10^{20}\text{ yr}$ and $\text{T}_{1/2}^{0\nu\beta\!\beta}>1.1\cdot10^{23}\text{ yr}$ at 90\% confidence level were derived, with corresponding half-life sensitivities of...
Topics: High Energy Physics - Experiment, Nuclear Experiment
Source: http://arxiv.org/abs/1704.05042
5
5.0
Apr 16, 2017
04/17
Apr 16, 2017
by
Nihar Ranjan Sahoo; for the STAR Collaboration
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We present two measurements related to jet production in p+p and central Au+Au collisions at $\sqrt{{s}_{NN}}$=200 GeV. Firstly, a study of semi-inclusive charged recoil jets coincident with high-$\rm{p_{T}}$ direct-photon and neutral pions, and secondly, the hadron correlations with respect to reconstructed di-jet triggers. Indication of medium effects is observed by comparing $\gamma$+jet and $\pi^{0}$+jet measurements. The di-jet+hadron study shows signs that the medium-induced modifications...
Topics: Nuclear Theory, Nuclear Experiment, High Energy Physics - Experiment, High Energy Physics -...
Source: http://arxiv.org/abs/1704.04814
5
5.0
Apr 15, 2017
04/17
Apr 15, 2017
by
Shuzhe Shi; Jiechen Xu; Jinfeng Liao; Miklos Gyulassy
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eye 5
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Jet energy loss in heavy ion collisions, as quantified by the traditional observable of high $p_T$ hadron's nuclear modification factor $R_{AA}$, provides highly informative "imaging" of the hot medium created in heavy ion collisions. There are now comprehensive sets of available data, from average suppression to azimuthal anisotropy, from light to heavy flavors, from RHIC 200GeV to LHC 2.76TeV as well as 5.02TeV collisions. A unified description of such comprehensive data presents a...
Topics: Nuclear Theory, Nuclear Experiment, High Energy Physics - Phenomenology
Source: http://arxiv.org/abs/1704.04577
6
6.0
Apr 14, 2017
04/17
Apr 14, 2017
by
Guannan Xie; for the STAR Collaboration
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eye 6
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At RHIC, enhancements in the baryon-to-meson ratio for light hadrons and hadrons containing strange quarks have been observed in central heavy-ion collisions compared to those in p+p and peripheral heavy-ion collisions in the intermediate transverse momentum ($p_T$) range (2 $
Topic: Nuclear Experiment
Source: http://arxiv.org/abs/1704.04353
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6.0
Apr 14, 2017
04/17
Apr 14, 2017
by
Xu-Guang Huang; Wei-Tian Deng; Guo-Liang Ma; Gang Wang
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We give a numerical simulation of the generation of the magnetic field and the charge-separation signal due to the chiral magnetic effect (CME) --- the induction of an electric current by the magnetic field in a parity-odd matter --- in the collisions of isobaric nuclei, $^{96}_{44}$Ru + $^{96}_{44}$Ru and $^{96}_{40}$Zr + $^{96}_{40}$Zr, at $\sqrt{s_{\rm NN}}=200$ GeV. We show that such collisions provide an ideal tool to disentangle the CME signal from the possible elliptic-flow driven...
Topics: Nuclear Theory, Nuclear Experiment
Source: http://arxiv.org/abs/1704.04382
3
3.0
Apr 14, 2017
04/17
Apr 14, 2017
by
J. D. Osborn; for the PHENIX Collaboration
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Direct photons, being colorless objects, provide an unmodified control particle that can be used in conjunction with jets to probe the quark-gluon plasma. To leading order the direct photon momentum balances the momentum of opposing jets and can therefore provide a clean handle on the jet energy. Therefore, angular correlations with direct photons provide a mechanism to study the fragmentation of the opposing jet without performing jet reconstruction. Jet fragmentation modification has been...
Topics: Nuclear Experiment, High Energy Physics - Experiment
Source: http://arxiv.org/abs/1704.04457
8
8.0
Apr 14, 2017
04/17
Apr 14, 2017
by
D. McGlinchey
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eye 8
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These proceedings present highlighted results from PHENIX shown at the Quark Matter 2017 conference.
Topics: Nuclear Theory, Nuclear Experiment
Source: http://arxiv.org/abs/1704.04568
4
4.0
Apr 14, 2017
04/17
Apr 14, 2017
by
Jonah E. Bernhard; J. Scott Moreland; Steffen A. Bass
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We perform a global Bayesian analysis of a modern event-by-event heavy-ion collision model and LHC data at $\sqrt s$ = 2.76 and 5.02 TeV. After calibration, the model simultaneously describes multiplicity, transverse momentum, and flow data at both beam energies. We report new constraints on the scaling of initial-state entropy deposition and QGP transport coefficients, including a quantitative estimate of the temperature-dependent shear viscosity $(\eta/s)(T)$.
Topics: Nuclear Theory, Nuclear Experiment, High Energy Physics - Phenomenology
Source: http://arxiv.org/abs/1704.04462
3
3.0
Apr 14, 2017
04/17
Apr 14, 2017
by
Long Zhou; for the STAR Collaboration
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We report the first measurement of $\Lambda_c^+$ (average of $\Lambda_c^+$ and $\bar{\Lambda}_c^-$) baryon production and significantly improved measurement of $D_s^+$ (average of $D_s^+$ and $D_s^-$) meson production, within the rapidity range of $\left|y\right| < 1$ in Au+Au collisions at $\sqrt{s_{\rm NN}}$ = 200 GeV from the STAR experiment. The transverse momentum spectra of $\Lambda_c^+$ and $D_s^+$ as well as their yield ratios to that of $D^0$ meson are also presented and compared to...
Topic: Nuclear Experiment
Source: http://arxiv.org/abs/1704.04364
3
3.0
Apr 13, 2017
04/17
Apr 13, 2017
by
K. Hagino
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We overview the current status of theoretical approaches for heavy-ion fusion reactions at subbarrier energies. We particularly discuss theoretical challenges in the coupled-channels approach, that include i) a description of deep subbarrier hindrance of fusion cross sections, ii) the role of nuclear dissipation, iii) fusion of unstable nuclei, and iv) an interplay between fusion and multi-nucleon transfer processes. We also present results of a semi-microscopic approach to heavy-ion fusion...
Topics: Nuclear Theory, Nuclear Experiment
Source: http://arxiv.org/abs/1704.04337
3
3.0
Apr 13, 2017
04/17
Apr 13, 2017
by
Ning Yu
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Light nuclei have much smaller binding energy compared to the temperature of the system created in heavy-ion collisions. Consequently, the distributions of light nuclei can be used to probe the freeze-out properties, such as correlation volume and local baryon density of the medium created in high-energy nuclear collisions. In this paper, we report the results of deuteron and anti-deuteron production in Au+Au collision at $\sqrt{s_\mathrm{NN}}$ = 7.7, 11.5, 14.5, 19.6, 27, 39, 62.4, and 200...
Topics: Nuclear Experiment, High Energy Physics - Experiment
Source: http://arxiv.org/abs/1704.04335
4
4.0
Apr 13, 2017
04/17
Apr 13, 2017
by
Chun Shen; Gabriel Denicol; Charles Gale; Sangyong Jeon; Akihiko Monnai; Bjoern Schenke
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Using a hybrid (viscous hydrodynamics + hadronic cascade) framework, we model the bulk dynamical evolution of relativistic heavy-ion collisions at Relativistic Heavy Ion Collider (RHIC) Beam Energy Scan (BES) collision energies, including the effects from non-zero net baryon current and its dissipative diffusion. This framework is in full (3+1)D, which allows us to study the non-trivial longitudinal structure and dynamics of the collision systems, for example baryon stopping and transport, as...
Topics: Nuclear Theory, Nuclear Experiment, High Energy Physics - Phenomenology
Source: http://arxiv.org/abs/1704.04109
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5.0
Apr 13, 2017
04/17
Apr 13, 2017
by
Michael Winn
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The LHCb experiment offers the unique opportunity to study heavy-ion interactions in the forward region (2
Topics: Nuclear Experiment, High Energy Physics - Experiment
Source: http://arxiv.org/abs/1704.04217
3
3.0
Apr 13, 2017
04/17
Apr 13, 2017
by
Scott McDonald; Chun Shen; Francois Fillion-Gourdeau; Sangyong Jeon; Charles Gale
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In this work, we debut a new implementation of IP-Glasma and quantify the pre-equilibrium longitudinal flow in the IP-Glasma framework. The saturation physics based IP-Glasma model naturally provides a non-zero initial longitudinal flow through its pre-equilibrium Yang-Mills evolution. A hybrid IP-Glasma+MUSIC+UrQMD frame- work is employed to test this new implementation against experimental data and to make further predictions about hadronic flow observables in Pb+Pb collisions at 5.02 TeV....
Topics: Nuclear Theory, Nuclear Experiment, High Energy Physics - Phenomenology
Source: http://arxiv.org/abs/1704.07680
3
3.0
Apr 12, 2017
04/17
Apr 12, 2017
by
Prithwish Tribedy; for the STAR Collaboration
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We present STAR measurements of the charge-dependent three-particle correlator $\gamma^{a,b}=\langle \cos(\phi_1^{a}+\phi_2^{b}-2\phi_3)\rangle/v_{2}\{2\}$ and elliptic flow $v_{2}\{2\}$ in U+U, Au+Au and p+Au collisions at RHIC. The difference $\Delta \gamma = \gamma(\rm{opposite\!-\!sign})\!-\!\gamma(\rm{same\!-\!sign})$ measures charge separation across the reaction plane, a predicted signal of the Chiral Magnetic Effect (CME). Although charge separation has been observed, it has been argued...
Topics: Nuclear Theory, Nuclear Experiment, High Energy Physics - Phenomenology
Source: http://arxiv.org/abs/1704.03845
