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 - INSPIRE

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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

Jean-Philippe Lansberg
(
- Orsay, IPN
)
,
Hua-Sheng Shao
(
- CERN
)

Oct 17, 2016

18 pages

Published in:

Eur.Phys.J.C 77 (2017) 1, 1

Published: Dec 27, 2016

e-Print:

1610.05382 [hep-ph]

DOI:

10.1140/epjc/s10052-016-4575-x

Report number:

CERN-TH-2016-206

View in:

reference search513 citations

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Abstract: (Springer)

We propose a simple and model-independent procedure to account for the impact of the nuclear modification of the gluon density as encoded in nuclear collinear PDF sets on two-to-two partonic hard processes in proton–nucleus collisions. This applies to a good approximation to quarkonium, D and B meson production, generically referred to

\mathcal {H}

. Our procedure consists in parametrising the square of the parton scattering amplitude,

{\mathcal {A}}_{gg \rightarrow {\mathcal {H}} X}

and constraining it from the proton–proton data. Doing so, we have been able to compute the corresponding nuclear modification factors for

J/\psi

,

\Upsilon

and

D^0

as a function of y and

P_T

at

\sqrt{s_\mathrm{NN}}=5

and 8 TeV in the kinematics of the various LHC experiments in a model independent way. It is of course justified since the most important ingredient in such evaluations is the probability of each kinematical configuration. Our computations for D mesons can also be extended to B meson production. To further illustrate the potentiality of the tool, we provide – for the first time – predictions for the nuclear modification factor for

\eta _c

production in

p

Pb collisions at the LHC.

Note:

18 pages, 56 figures, 4 tables. Latex

CERN LHC Coll
heavy ion: scattering
p nucleus: scattering
nuclear matter: effect
nucleon: parton: distribution function
gluon: density
gluon gluon: scattering amplitude
quarkonium: production
D: production
B: production

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