Towards an automated tool to evaluate the impact of the nuclear modification of the gluon density on quarkonium, D and B meson production in proton–nucleus collisions

Lansberg, J. P.; Shao, Hua-Sheng

doi:10.1140/epjc/s10052-016-4575-x

Cited by 201 publications

(128 citation statements)

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Section: Jhep04(2018)108mentioning

confidence: 99%

“…Similar predictions were obtained with Herwig7. The p-Pb measurement is compared then in figure 11 (left) with the calculations from Lansberg and Shao [94] for p-Pb, with Λ + c and D 0 cross section obtained through a parameterisation of pp data and using EPS09NLO nuclear modification factors. Among the different predictions this calculation is the closest to data.…”

Section: Jhep04(2018)108mentioning

confidence: 99%

“…[17] and [18]). The p-Pb measurement as a function of p T is also compared with calculations from Lansberg and Shao [94]. The predictions from event generators as a function of y are also compared with the LHCb measurement [52,97].…”

Section: Jhep04(2018)108mentioning

confidence: 99%

“…This calculation for p-Pb collisions underpredicts the measured values by a similar amount as observed in pp collisions. The Λ c cross section is also compared with a calculation [94], based on a data-driven modelling of the scattering at the partonic level, specifically designed to evaluate the impact of the nuclear modification of the gluon density on heavy-flavor hadrons.-25 - The tool is based on the HELAC-Onia package [95,96], originally developed for heavyquarkonium studies, recently extended to heavy-flavor mesons and baryons. Differently from other calculations shown in figure 9, this is therefore a prediction for p-Pb collisions based on pp data.…”

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confidence: 99%

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Λ+c production in pp collisions at $$ \sqrt{s}=7 $$ TeV and in p-Pb collisions at $$ \sqrt{s_{\mathrm{NN}}}=5.02 $$ TeV

Acharya¹,

Acosta²,

Adamová³

et al. 2018

J. High Energ. Phys.

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The p T -differential production cross section of prompt Λ + c charmed baryons was measured with the ALICE detector at the Large Hadron Collider (LHC) in pp collisions at √ s = 7 TeV and in p-Pb collisions at √ s NN = 5.02 TeV at midrapidity. The Λ + c and Λ -c were reconstructed in the hadronic decay modes Λ + c → pK − π + , Λ + c → pK 0 S and in the semileptonic channel Λ + c → e + ν e Λ (and charge conjugates). The measured values of the Λ + c /D 0 ratio, which is sensitive to the c-quark hadronisation mechanism, and in particular to the production of baryons, are presented and are larger than those measured previously in different colliding systems, centre-of-mass energies, rapidity and p T intervals, where the Λ + c production process may differ. The results are compared with the expectations obtained from perturbative Quantum Chromodynamics calculations and Monte Carlo event generators. Neither perturbative QCD calculations nor Monte Carlo models reproduce the data, indicating that the fragmentation of heavy-flavour baryons is not well understood. The first measurement at the LHC of the Λ + c nuclear modification factor, R pPb , is also presented. The R pPb is found to be consistent with unity and with that of D mesons within the uncertainties, and consistent with a theoretical calculation that includes cold nuclear matter effects and a calculation that includes charm quark interactions with a deconfined medium. Keywords: Heavy Ion Experiments, Quark gluon plasmaArXiv ePrint: 1712.09581Open Access, Copyright CERN, for the benefit of the ALICE Collaboration. Article funded by SCOAP 3 .https://doi.org/10.1007/JHEP04(2018)108 The ALICE collaboration 40 JHEP04(2018)108 IntroductionThe study of charm production at the Large Hadron Collider (LHC) is an important tool to test predictions obtained from perturbative Quantum Chromodynamics (pQCD) calculations for proton-proton (pp) collisions. These calculations are based on the factorisation approach that describes heavy-flavour production as a convolution of the parton distribution functions, the parton hard-scattering cross section and the fragmentation function. The cross section for heavy-flavour hadron production can be obtained from perturbative calculations at next-to-leading order with next-to-leading-log resummation, like the General-Mass Variable-Flavour-Number Scheme (GM-VFNS [1, 2]) and 4]) approaches. No predictions are, however, available for baryons in the latter approach due to lack of knowledge of the fragmentation function of charm quarks into baryons. Cross section calculations are available also with the k T factorisation framework [5]. These theoretical calculations generally describe within uncertainties the measurements at the LHC, with the central predictions for beauty production lying closer to data than the central predictions for charm production [6]. The measured -1 - JHEP04(2018)108transverse momentum differential cross section of charm mesons lies in the upper part of the FONLL uncertainty band and is systematically below th...

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Section: Jhep04(2018)108mentioning

confidence: 99%

Section: Jhep04(2018)108mentioning

confidence: 99%

Section: Jhep04(2018)108mentioning

confidence: 99%

mentioning

confidence: 99%

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Λ+c production in pp collisions at $$ \sqrt{s}=7 $$ TeV and in p-Pb collisions at $$ \sqrt{s_{\mathrm{NN}}}=5.02 $$ TeV

Acharya¹,

Acosta²,

Adamová³

et al. 2018

J. High Energ. Phys.

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“…The measured R pAu is generally consistent with the R dAu result reported by PHENIX [14] within uncertainties. The theoretical predictions with only the nuclear PDF effect using the nCTEQ15 [15] or EPS09NLO [16] nuclear PDFs sets can touch the upper limit of the data. However, the calculation including an additional nuclear absorption effect [17] is favored by the data.…”

Section: Star Preliminarymentioning

confidence: 99%

Recent highlights from STAR

Zha

2018

EPJ Web Conf.

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Abstract. The Solenoidal Tracker at RHIC (STAR) experiment takes advantage of its excellent tracking and particle identification capabilities at mid-rapidity to explore the properties of strongly interacting QCD matter created in heavy-ion collisions at RHIC. The STAR collaboration presented 7 parallel and 2 plenary talks at Strangeness in Quark Matter 2017 and covered various topics including heavy flavor measurements, bulk observables, electro-magnetic probes and the upgrade program. This paper highlights some of the selected results.

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Gravastar Model in Krori–Barua Metric Under f(Q)$f(\mathcal {Q})$ Gravity

Mohanty,

Sahoo

2024

Fortschritte der Physik

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In this paper, the characteristics of a gravastar in gravity, which is upheld by Krori–Barua (KB) metric are explored. The authors have used KB metric for the interior and shell regions of the gravastar. The field equations are deduced by using KB metric. In the outside regions of the gravastar, two regular black hole metrics are taken. Additionally, the Israel junction condition to calculate the potential difference across the thin shell concerning different types of regular black holes, such as Bardeen and Hayward is applied. The physical properties like proper length, entropy, energy, equation of state, and stability are also discussed.

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Towards an automated tool to evaluate the impact of the nuclear modification of the gluon density on quarkonium, D and B meson production in proton–nucleus collisions

Cited by 201 publications

References 73 publications

Λ+c production in pp collisions at $$ \sqrt{s}=7 $$ TeV and in p-Pb collisions at $$ \sqrt{s_{\mathrm{NN}}}=5.02 $$ TeV

Λ+c production in pp collisions at $$ \sqrt{s}=7 $$ TeV and in p-Pb collisions at $$ \sqrt{s_{\mathrm{NN}}}=5.02 $$ TeV

Recent highlights from STAR

Gravastar Model in Krori–Barua Metric Under f(Q)$f(\mathcal {Q})$ Gravity

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