Culture(s) enfantine(s)

Arleo, Andy; Delalande, Julie

doi:10.4000/books.pur.10736

Cited by 38 publications

(91 citation statements)

References 11 publications

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“…A clear suppression with respect to p-p collisions is observed at forward rapidity and low p T , compatible with the expected effect from nuclear PDF modifications (shadowing) as computed in the framework of NRQCD factorisation using several collinear nuclear PDF sets with the HELAC-Onia package [6,7]. However, the rapidity dependence can also be well explained by the coherent energy loss model [8]. The result at forward rapidity is also compatible with the latest calculations based on the Color Glass Condensate model [9].…”

Section: P-pb Collisionssupporting

confidence: 79%

Results on heavy ion physics at LHCb

Graziani

2019

J. Phys.: Conf. Ser.

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In the last years, the LHCb experiment established itself as an important contributor to heavy ion physics by exploiting some of its specific features. Production of particles, notably heavy flavour states, can be studied in p-p, p-Pb and Pb-Pb collisions at LHC energies in the forward rapidity region (pseudorapidity between 2 and 5), providing measurements which are highly complementary to the other LHC experiments. Moreover, owing to its forward geometry, the detector is also well suited to study fixed-target collisions, obtained by impinging the LHC beams on gas targets with different mass numbers. In this configuration, p-A collisions can be studied at the relatively unexplored scale of √ sNN ∼ 100 GeV, also providing valuable inputs to cosmic ray physics. An overview of the measurements obtained so far by the LHCb ion program is presented.

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Section: P-pb Collisionssupporting

confidence: 79%

Results on heavy ion physics at LHCb

Graziani

2019

J. Phys.: Conf. Ser.

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“…The measurements agree with most predictions. The NLO prediction (Albacete et al 2013) overshoots the data at large rapidities if only nuclear modifications are taken into account but give a good description of the data if coherent energy loss is included (Arleo & Peigne 2013 Figure 6 shows R pPb and R FB for Υ(1S) (LHCb collaboration 2014c) together with the LHCb results of prompt J/Ψ and J/Ψ from b with theoretical predictions. The data are consistent with a suppression in the forward region and a possible enhancement in the backward region.…”

Section: Cold Nuclear Effectsmentioning

confidence: 89%

“…Figures 4 and 5 show the nuclear modification factors and the forward-backward production ratios, for prompt J/Ψ mesons and J/Ψ from b as functions of rapidity (LHCb collaboration 2014d), compared to different theoretical predictions (Ferreiro et al 2013;Conesa del Valle et al 2014;Albacete et al 2013;Arleo & Peigne 2013). A clear suppression of about 40 % at large rapidity is observed for prompt J/Ψ production.…”

Section: Cold Nuclear Effectsmentioning

confidence: 95%

“…In ultra-relativistic heavy-ion collisions, the production of quarkonia or electroweak bosons is expected to be suppressed with respect to proton-proton collisions, if a quarkgluon plasma, QGP, is created (Matsui & Satz 1986). Such a suppression of heavy quarkonia and Z boson production with respect to proton-proton (pp) collisions can also take place in proton-nucleus (pA) collisions, where a quarkgluon plasma is not expected to be created but only cold nuclear matter effects, such as nuclear absorption, parton shadowing and parton energy loss in initial and final states can occur (Ferreiro et al 2013;Albacete et al 2013;Arleo & Peigne 2013). The study of pA collisions therefore provides important input to disentangle the QGP effects from cold nuclear effects, probe nuclear parton distribution functions, which are poorly constrained, and provide a reference sample for nucleus-nucleus collisions.…”

Section: Introductionmentioning

confidence: 99%

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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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“…Drell-Yan production between the ψ(2S) and the ϒ (1S) and the J/ψ: this measurement was proposed in [78] for p-A collisions. With the requested luminosity by LHCb in the 2016 running, this observable should be in reach in p-A collisions [79].…”

Section: Non-quarkonium Observables and Their Impact On Quarkonium Anmentioning

confidence: 99%