Measurement of differential J/psi production cross sections and forward-backward ratios in p plus Pb collisions with the ATLAS detector [Elektronisk resurs]
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Aad, G. (författare)
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Bergeås, Elin Kuutmann (författare)
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Brenner, Richard (författare)
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Buszello, Claus P. (författare)
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Ekelöf, Tord (författare)
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Ellert, Mattias (författare)
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Ferrari, Arnaud (författare)
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Isaksson, Charlie (författare)
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Madsen, Alexander (författare)
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Öhman, Henrik (författare)
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Pelikan, Daniel (författare)
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Rangel-Smith, Camilla (författare)
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Zwalinski, L. (författare)
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Uppsala universitet Teknisk-naturvetenskapliga vetenskapsområdet (utgivare)
- 2015
- Engelska.
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Ingår i: Physical Review C. Nuclear Physics. - 0556-2813. ; 92:3
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Sammanfattning
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- Measurements of differential cross sections for J/psi production in p + Pb collisions at root S-NN= 5.02 TeV at the CERN Large Hadron Collider with the ATLAS detector are presented. The data set used corresponds to an integrated luminosity of 28.1 nb(-1). The J/psi mesons are reconstructed in the dimuon decay channel over the transverse momentum range 8 < PT < 30 GeV and over the center-of-mass rapidity range -2.87 < y* < 1.94. Prompt J/psi are separated from J/psi resulting from b-hadron decays through an analysis of the distance between the J/psi decay vertex and the event primary vertex. The differential cross section for production of nonprompt J/psi is compared to a FONLL calculation that does not include nuclear effects. Forward-backward production ratios are presented and compared to theoretical predictions. These results complement previously published results by covering a region of higher transverse momentum and more central rapidity. They thus constrain the kinematic dependence of nuclear modifications of charmonium and b-quark production in p + Pb collisions.
Ämnesord
- Natural Sciences (hsv)
- Physical Sciences (hsv)
- Naturvetenskap (hsv)
- Fysik (hsv)
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