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P.; Haruna, K.; Haslum, E.; Hayano, R.; He, X.; Heffner, M.; Hemmick, T. K.; Hester, T.; Hill, J. C.; Hohlmann, M.; Holzmann, W.; Homma, K.; Hong, B.; Horaguchi, T.; Hornback, D.; Huang, S.; Ichihara, T.; Ichimiya, R.; Iinuma, H.; Ikeda, Y.; Imai, K.; Imrek, J.; Inaba, M.; Isenhower, D.; Ishihara, M.; Isobe, T.; Issah, M.; Isupov, A.; Ivanischev, D.; Iwanaga, Y.; Jacak, B.; Jia, J.; Jiang, X.; Jin, J.; Johnson, B. M.; Jones, T. J.; Joo, K. S.; Jouan, D.; Jumper, D. S.; Kajihara, F.; Kametani, S.; Kamihara, N.; Kamin, J.; Kang, J. H.; Kapustinsky, J.; Karatsu, K.; Kasai, M.; Kawall, D.; Kawashima, M.; Kazantsev, A. V.; Kempel, T.; Khanzadeev, A.; Kijima, K. M.; Kikuchi, Jun; Kim, A.; Kim, B. I.; Kim, D. H.; Kim, D. J.; Kim, E.; Kim, E. J.; Kim, S. H.; Kim, Y. J.; Kinney, E.; Kiriluk, K.; Kiss, Á.; Kistenev, E.; Klay, J. L.; Klein-Boesing, Christian; Kochenda, L.; Komkov, B.; Konno, M.; Koster, J.; Kozlov, A.; Král, A.; Kravitz, A.; Kunde, G. J.; Kurita, K.; Kurosawa, M.; Kweon, M. J.; Kwon, Y.; Kyle, G. S.; Lacey, R.; Lai, Yue Shi; Lajoie, J. G.; Layton, D.; Lebedev, A.; Lee, D. M.; Lee, J.; Lee, K. B.; Lee, T.; Leitch, M. J.; Leite, M. A. L.; Lenzi, B.; Li, X.; Lichtenwalner, P.; Liebing, P.; Levy, L. A. Linden; Liška, T.; Litvinenko, A.; Liu, H.; Liu, M. X.; Love, B.; Lynch, D.; Maguire, C.; Makdisi, Y. I.; Malakhov, A.; Malik, M. D.; Manko, V.; Mannel, E.; Mao, Y.; Mašek, L.; Masui, H.; Matathias, F.; McCumber, M.; McGaughey, P. L.; McGlinchey, D.; Means, N.; Meredith, B.; Miake, Y.; Mibe, T.; Mignerey, A. C.; Mikeš, P.; Miki, K.; Milov, A.; Mishra, M.; Mitchell, J. T.; Mohanty, A. K.; Moon, H. J.; Morino, Y.; Morreale, A.; Morrison, D. P.; Moukhanova, T. V.; Mukhopadhyay, D.; Murakami, T.; Murata, J.; Nagamiya, S.; Nagle, J. L.; Naglis, M.; Nagy, M. I.; Nakagawa, I.; Nakamiya, Y.; Nakamura, K.; Nakamura, T.; Nakano, K.; Nam, S. K.; Newby, J.; Nguyen, M.; Nihashi, M.; Niita, T.; Nouicer, R.; Nyanin, A.; Oakley, C.; O’Brien, E.; Oda, S.; Ogilvie, C. 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doi:10.1103/physrevlett.107.142301

Cited by 115 publications

(77 citation statements)

References 24 publications

Supporting

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“…[63]. The ratio R dAu (y) [64] is shown (d). The EPS09 NLO uncertainty band is compared to the data.…”

Section: F Factorizationmentioning

confidence: 99%

Shadowing effects onJ/ψandΥproduction at energies available at the CERN Large Hadron Collider

Vogt

2015

Phys. Rev. C

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Background: Proton-nucleus collisions have been used as a intermediate baseline for the determination of cold medium effects. They lie between proton-proton collisions in vacuum and nucleusnucleus collisions which are expected to be dominated by hot matter effects. Modifications of the quark densities in nuclei relative to those of the proton are well established although those of the gluons in the nucleus are not well understood. The effect of these modifications on quarkonium production are studied in proton-lead collisions at the LHC at a center of mass energy of 5.02 TeV. Purpose: The possibility of whether the LHC proton-lead data can be described by nuclear modifications of the parton densities, referred to as shadowing, alone is examined. The results are compard to the nuclear modification factor and to the forward-backward ratio, both as a function of transverse momentum, pT , and rapidity, y. Methods: The color evaporation model of quarkonium production is employed at next-to-leading order in the total cross section and leading order in the transverse momentum dependence. The EPS09 NLO modifications are used as a standard of comparison. The effect of the proton parton density and the choice of shadowing parameterization on the pT and rapidity dependence of the result is studied. The consistency of the shadowing calculations at leading and next-to-leading order are checked. The size of the mass and scale uncertainties relative to the uncertainty on the shadowing parameterization is also investigated. Finally, whether the expected cold matter effect in nucleus-nucleus collisions can be modeled as the product of proton-nucleus results at forward and backward rapidity is studied. Results: The rapidity and pT dependence of the nuclear modification factor is found to be generally consistent with the next-to-leading order calculations in the color evaporation model. The forwardbackward ratio is more difficult to describe with shadowing alone. The leading and next-to-leading order calculations are inconsistent for EPS09 while other available parameterizations are consistent. The mass and scale uncertainties on quarkonium production are larger than those of the nuclear parton densities. Conclusions: While shadowing is consistent with the nuclear suppression factors within the uncertainties, it is not consistent with the measured forward-backward asymmetry, especially as a function of transverse momentum. Data from p + p collisions at the same energy are needed.

show abstract

“…[63]. The ratio R dAu (y) [64] is shown (d). The EPS09 NLO uncertainty band is compared to the data.…”

Section: F Factorizationmentioning

confidence: 99%

Shadowing effects onJ/ψandΥproduction at energies available at the CERN Large Hadron Collider

Vogt

2015

Phys. Rev. C

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show abstract

“…Previous experiments [9][10][11][12][13] have also shown evidence that the production crosssection of J/ψ mesons or light hadrons in the forward region (positive rapidity) of pA or deuteron-gold collisions differs from that in the backward region (negative rapidity), where "forward" and "backward" are defined relative to the direction of the proton or deuteron beam. Measurements of the nuclear modification factor R pPb and the forward-backward production ratio…”

Section: Jhep02(2014)072mentioning

confidence: 99%

“…The differences in the distributions of p T , p, and y lab between data and simulated samples are small. Sizeable differences in the distributions of the track multiplicity are observed, particularly between the simulation and the backward sample, for which the particle production cross-section is larger [9,[11][12][13]. To take this effect into account, the simulated pp samples are reweighted to match the data with weight factors derived from the distributions in figure 2.…”

Section: Jhep02(2014)072mentioning

confidence: 99%

See 1 more Smart Citation

Study of J/ψ production and cold nuclear matter effects in pPb collisions at $ \sqrt{{{s_{NN }}}} $ = 5 TeV

Aaij

Adeva

Adinolfi

et al. 2014

J. High Energ. Phys.

118

122

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The production of J/ψ mesons with rapidity 1.5 < y < 4.0 or −5.0 < y < −2.5 and transverse momentum p T < 14 GeV/c is studied with the LHCb detector in proton-lead collisions at a nucleon-nucleon centre-of-mass energy √ s N N = 5 TeV. The J/ψ mesons are reconstructed using the dimuon decay mode. The analysis is based on a data sample corresponding to an integrated luminosity of about 1.6 nb −1 . For the first time the nuclear modification factor and forward-backward production ratio are determined separately for prompt J/ψ mesons and J/ψ from b-hadron decays. Clear suppression of prompt J/ψ production with respect to proton-proton collisions at large rapidity is observed, while the production of J/ψ from b-hadron decays is less suppressed. These results show good agreement with available theoretical predictions. The measurement shows that cold nuclear matter effects are important for interpretations of the related quark-gluon plasma signatures in heavy-ion collisions.Keywords: Relativistic heavy ion physics, Quarkonium, Heavy quark production, Heavy Ions, Particle and resonance production A Results in tables 13The LHCb collaboration 19 IntroductionThe suppression of heavy quarkonia production with respect to proton-proton (pp) collisions [1] is one of the most distinctive signatures of the formation of quark-gluon plasma, a hot nuclear medium created in ultrarelativistic heavy-ion collisions. However, the suppression of heavy quarkonia and light hadron production with respect to pp collisions can also take place in proton-nucleus (pA) collisions, where a quark-gluon plasma is not expected to be created and only cold nuclear matter effects, such as nuclear absorption, parton shadowing and parton energy loss in initial and final states occur [2][3][4][5][6][7][8]. The study of pA collisions is important to disentangle the effects of quark-gluon plasma from cold nuclear matter, and to provide essential input to the understanding of nucleus-nucleus collisions. Nuclear effects are usually characterised by the nuclear modification factor, defined as the production cross-section of a given particle in pA collisions divided by that in pp collisions and the number of colliding nucleons in the nucleus (given by the atomic number A),where y is the rapidity of the particle in the nucleon-nucleon centre-of-mass frame, p T is the transverse momentum of the particle, and √ s NN is the nucleon-nucleon centre-of-mass energy. The suppression of heavy quarkonia and light hadron production with respect to pp collisions at large rapidity has been observed in pA collisions [9, 10] and in deuterongold collisions [11][12][13], but has not been studied in proton-lead (pPb) collisions at the TeV -1 - JHEP02(2014)072scale. Previous experiments [9][10][11][12][13] have also shown evidence that the production crosssection of J/ψ mesons or light hadrons in the forward region (positive rapidity) of pA or deuteron-gold collisions differs from that in the backward region (negative rapidity), where "forward" and "backward" are define...

show abstract

“…The charged hadron result is often considered as a rapidity shift in the Au-going direction via soft processes. Figure 10 also shows the J/ψ R dAu [52]. In the case of the J/ψ, the relative R dAu modification as a function of rapidity is similar to that of the φ meson and heavy flavor decay leptons.…”

Section: Sourcementioning

confidence: 78%

ϕmeson production ind+Aucollisions atsNN
Adare¹,
Aidala²,
Ajitanand³
et al. 2015
Phys. Rev. C
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0
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The PHENIX collaboration has measured φ meson production in d+Au collisions at √ s N N = 200 GeV using the dimuon and dielectron decay channels. The φ meson is measured in the forward (backward) d-going (Au-going) direction, 1.2 < y < 2.2 (−2.2 < y < −1.2) in the transversemomentum (pT ) range from 1-7 GeV/c, and at midrapidity |y| < 0.35 in the pT range below 7 GeV/c. The φ meson invariant yields and nuclear-modification factors as a function of pT , rapidity, and centrality are reported. An enhancement of φ meson production is observed in the Au-going direction, while suppression is seen in the d-going direction, and no modification is observed at midrapidity relative to the yield in p+p collisions scaled by the number of binary collisions. Similar behavior was previously observed for inclusive charged hadrons and open heavy flavor indicating similar cold-nuclear-matter effects.

show abstract

Cold Nuclear Matter Effects onJ/ψYields as a Function of Rapidity and Nuclear Geometry ind+ACollisions atsN

Cited by 115 publications

References 24 publications

Shadowing effects onJ/ψandΥproduction at energies available at the CERN Large Hadron Collider

Shadowing effects onJ/ψandΥproduction at energies available at the CERN Large Hadron Collider

Study of J/ψ production and cold nuclear matter effects in pPb collisions at $ \sqrt{{{s_{NN }}}} $ = 5 TeV

ϕmeson production ind+Aucollisions atsNN
Adare¹,
Aidala²,
Ajitanand³
et al. 2015
Phys. Rev. C
Self Cite
18
0
14
0
View full text Add to dashboard Cite

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Cold Nuclear Matter Effects onJ/ψYields as a Function of Rapidity and Nuclear Geometry ind+ACollisions atsN

Cited by 115 publications

References 24 publications

Shadowing effects onJ/ψandΥproduction at energies available at the CERN Large Hadron Collider

Shadowing effects onJ/ψandΥproduction at energies available at the CERN Large Hadron Collider

Study of J/ψ production and cold nuclear matter effects in pPb collisions at $ \sqrt{{{s_{NN }}}} $ = 5 TeV

ϕmeson production ind+Aucollisions atsNNAdare1, Aidala2, Ajitanand3 et al. 2015Phys. Rev. CSelf Cite180140View full textAdd to dashboardCite

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ϕmeson production ind+Aucollisions atsNN
Adare¹,
Aidala²,
Ajitanand³
et al. 2015
Phys. Rev. C
Self Cite
18
0
14
0
View full text Add to dashboard Cite