PREDICTIONS FOR p+<font>Pb</font>COLLISIONS AT $\sqrt{s_{_{\it NN}}} = 5$

Albacete, Javier L.; Armesto, N.; Baier, Rudolf; Barnaföldi, G. G.; Barrette, J.; De, Somnath; Deng, W.; Dumitru, Adrian; Dusling, Kevin; Eskola, Kari J.; Fries, Rainer J.; Fujii, H.; Gelis, François; Gyulassy, Miklós; He, Y.; Helenius, Ilkka; Kang, Zhong Bo; Kopeliovich, B. Z.; Kutak, Krzysztof; Lévai, P.; Lin, Zi Wei; Mueller, Alfred H.; Nara, Yasushi; Nemchik, J.; Papp, Gábor; Petrovici, M.; Qiu, Jian; Rezaeian, Amir H.; Ru, Peng; Schiff, D.; Sapeta, Sebastian; Pop, V. Topor; Tribedy, P.; Venugopalan, Raju; Vitev, Ivan; Vogt, R.; Wang, Enke; Wang, Xin‐Nian; Xing, Hongxi; Xu, Rong; Zhang, Ben Wei; Zhang, Wei Ning

doi:10.1142/s0218301313300075

Cited by 180 publications

(223 citation statements)

References 143 publications

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“…At backward rapidity, the latter model is in agreement with our data despite some tension at low p T . The calculations by R. Vogt [8] for the p T -dependence are consistent with the ALICE results for all three rapidity domains in the provided transverse momentum ranges (p T > 2.5 GeV/c).…”

supporting

confidence: 81%

“…The central rapidity measurement is consistent with the forward rapidity result albeit exhibiting larger uncertainties. The predictions by R. Vogt employing NLO nPDF EPS09 [20] and the Colour Evaporation Model (CEM) [8] as well as the calculations by E. Ferreiro et al [9] with EPS09 [20] at LO assuming 2 → 2 production mechanism (gg → J/ψg) are consistent with the experimental results. In case of the model by E. Ferreiro, the possible impact of a finite effective nuclear absorption of J/ψ resonance or the precursor state is also calculated and shown.…”

supporting

confidence: 76%

“…The results are consistent with shadowing and/or coherent energy loss in case of the rapidity dependence. The coherent energy loss model and the calculations based solely on shadowing [8] provide a reasonable description of the experimental data at p T > 2.5 GeV/c, whereas the low-p T nuclear modification factor at forward rapidity are underestimated by the present version of the coherent energy loss model. The inclusive ψ(2S)/J/ψ ratio measured in p-Pb collisions shows a clear suppression w.r.t.…”

mentioning

confidence: 64%

“…The open boxes indicate the uncorrelated systematical uncertainties, the filled areas the partially correlated systematical uncertainties and the grey box at unity the common normalization uncertainty due to the T pA -uncertainty. The theory predictions can be found in [8,9,10,11]. extraction is estimated from the Root Mean Square of the extracted J/ψ yields obtained combining different signal and background shape assumptions and varies between 1-4 % depending on p T and rapidity.…”

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confidence: 99%

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Inclusive <mml:math altimg="si1.gif" overflow="scroll" xmlns:xocs="http://www.elsevier.com/xml/xocs/dtd" xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://www.elsevier.com/xml/ja/dtd" xmlns:ja="http://www.elsevier.com/xml/ja/dtd" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:tb="http://www.elsevier.com/xml/common/table/dtd" xmlns:sb="http://www.elsevier.com/xml/common/struct-bib/dtd" xmlns:ce="http://www.elsevier.com/xml/common/dtd" xm

Winn

2014

Nuclear Physics A

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We report on the inclusive J/ψ nuclear modification factor in p-Pb collisions at √ s NN = 5.02 TeV as a function of rapidity y and transverse momentum p T . The experimental coverage extends down to p T = 0 GeV/c in the three rapidity ranges accessible by ALICE (−4.46 < y cms < −2.96, −1.37 < y cms < 0.46, 2.03 < y cms < 3.53). The obtained results as a function of rapidity are in agreement with theory predictions based only on shadowing or on coherent energy loss. At forward and backward rapidity, the ψ(2S) measurement complements the J/ψ results. The ratio between the ψ(2S) and J/ψ cross section is significantly smaller in p-Pb than in pp collisions in both rapidity regions.The seminal paper from T. Matsui and H. Satz [1] published in 1986 initiated intense theoretical and experimental studies of J/ψ production as a probe of deconfinement in nucleus-nucleus (AA) collisions. At LHC energies, in addition to the originally proposed J/ψ suppression due to colour screening, the production of J/ψ due to (re-)combination of charm quarks is suggested as an additional mechanism in two theoretical approaches: the statistical hadronisation at the confinement phase boundary [2,3] and transport models [4,5,6]. The latter assume destruction and production of charmonium states predominantly during the deconfined stage of the system evolution in addition to the primordial production. In this context, the investigation of charmonia in p-Pb collisions at the LHC represents a crucial ingredient for the interpretation of J/ψ AA-measurements. It gives access to nuclear effects, which are not attributable to deconfinement, but can alter the nuclear modification factor R AA = N J/ψ,AA /(< T AA > ·σ J/ψ,pp ). N J/ψ,AA represents in this formula the efficiency corrrected J/ψ-yield per event in AA collisions, T AA denotes the nuclear overlap function and σ J/ψ,pp the J/ψ cross section in proton-proton (pp) collisions at the same centre of mass energy per nucleon-nucleon collision.ALICE has measured J/ψ in p-Pb collisions at a centre of mass energy of 5.02 TeV in the central barrel detectors with a pseudorapidity acceptance |η lab,track | < 0.9 via the dielectron decay channel and in the forward spectrometer with an acceptance of 2.5 < η lab,muon < 4.0 via the dimuon decay channel. A description of the experiment can be found in [7]. An inversion of the beam direction has enabled the muon spectrometer to measure the J/ψ on the proton and on the lead fragmentation side in the asymmetric p-Pb collision system. In the following, the rapidity of the incoming proton is chosen to be positive, which fixes the rapidity sign convention of the dimuon pair. The centre of mass system of the two colliding projectiles is boosted with respect to the laboratory frame system by ∆y = 0.465 resulting in slightly asymmetric rapidity coverages with respect to y = 0: −4.46 < y cms < −2.96 at backward, −1.37 < y cms < 0.43 at central rapidity and 2.03 < y cms < 3.53 at forward rapidity. In the dimuon acceptance, the J/ψ production was measured in six ...

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supporting

confidence: 81%

supporting

confidence: 76%

mentioning

confidence: 64%

mentioning

confidence: 99%

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Winn

2014

Nuclear Physics A

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“…QGP, is not expected to be created and only cold nuclear matter (CNM) effects exist. Such CNM effects include: initial-state nuclear effects on the parton densities (shadowing); coherent energy loss consisting of initial-state parton energy loss and final-state energy loss; and final-state absorption by nucleons, which is expected to be negligible at LHC energies [2][3][4][5][6][7][8][9]. The study of pA collisions is important to disentangle the effects of QGP from those of CNM, and to provide essential input to the understanding of nucleus-nucleus collisions.…”

Section: Introductionmentioning

confidence: 99%

Study of ψ(2S) production and cold nuclear matter effects in pPb collisions at s N N = 5 $$ \sqrt{s_{N\;N}}=5 $$ TeV

Aaij¹,

Beteta²,

Adeva³

et al. 2016

J. High Energ. Phys.

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The production of ψ(2S) mesons is studied in dimuon final states using protonlead (pPb) collision data collected by the LHCb detector. The data sample corresponds to an integrated luminosity of 1.6 nb −1 . The nucleon-nucleon centre-of-mass energy of the pPb collisions is √ s N N = 5 TeV. The measurement is performed using ψ(2S) mesons with transverse momentum less than 14 GeV/c and rapidity y in the ranges 1.5 < y < 4.0 and −5.0 < y < −2.5 in the nucleon-nucleon centre-of-mass system. The forward-backward production ratio and the nuclear modification factor are determined for ψ(2S) mesons. Using the production cross-section results of ψ(2S) and J/ψ mesons from b-hadron decays, the bb cross-section in pPb collisions at √ s N N = 5 TeV is obtained.

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LHCb results in proton‐nucleus collisions at the LHC

Müller

2015

Astron Nachr

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The forward acceptance of the LHCb detector allows it to probe proton-ion collisions in a unique kinematic range, complementary to the other LHC experiments. The production of J/Ψ and Υ-mesons decaying into two muons is studied at the LHCb experiment in proton-lead collisions at a proton-nucleon centre-of-mass energy √ s NN = 5 TeV. The analysis is based on a data sample corresponding to an integrated luminosity of 1.6 nb −1 . The nuclear modification factor and the forward-backward production ratio are determined for J/Ψ and Υ(1S) mesons. Clear suppression of prompt J/Ψ production is observed with respect to the production in proton-proton collisions at large rapidity, while the suppression of J/Ψ from b-hadron decays is less pronounced. The nuclear modification factor for Υ(1S) mesons in the forward region is found to be similar to those for J/Ψ from b-hadron decays. Furthermore, a first observation of Z bosons at large rapidities in proton-lead collisions is reported.

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PREDICTIONS FOR p+PbCOLLISIONS AT $\sqrt{s_{_{\it NN}}} = 5$

Abstract: Predictions for charged hadron, identified light hadron, quarkonium, photon, jet and gauge bosons in p+ Pb collisions at [Formula: see text] are compiled and compared. When test run data are available, they are compared to the model predictions.

Cited by 180 publications

References 143 publications

Study of ψ(2S) production and cold nuclear matter effects in pPb collisions at s N N = 5 $$ \sqrt{s_{N\;N}}=5 $$ TeV

LHCb results in proton‐nucleus collisions at the LHC

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