Measurement of J/psi production in pp collisions at root s=7 TeV

LHCb collaboration

doi:10.1140/epjc/s10052-011-1645-y

Measurement of J/psi production in pp collisions at root s=7 TeV

LHCb collaboration

Research output: Contribution to journal › Article › Academic › peer-review

Abstract

The production of J/psi mesons in proton-proton collisions at root s = 7 TeV is studied with the LHCb detector at the LHC. The differential cross-section for prompt J/psi production is measured as a function of the J/psi transverse momentum p(T) and rapidity y in the fiducial region p(T) is an element of [0; 14] GeV/c and y is an element of [2.0; 4.5]. The differential cross-section and fraction of J/psi from b-hadron decays are also measured in the same p(T) and y ranges. The analysis is based on a data sample corresponding to an integrated luminosity of 5.2 pb(-1). The measured cross-sections integrated over the fiducial region are 10.52 +/- 0.04 +/- 1.40(-2.20)(+1.64) mu b for prompt J/psi production and 1.14 +/- 0.01 +/- 0.16 mu b for J/psi from b-hadron decays, where the first uncertainty is statistical and the second systematic. The prompt J/psi production cross-section is obtained assuming no J/psi polarisation and the third error indicates the acceptance uncertainty due to this assumption.

Original language	English
Article number	1645
Number of pages	17
Journal	European Physical Journal C
Volume	71
Issue number	5
DOIs	https://doi.org/10.1140/epjc/s10052-011-1645-y
Publication status	Published - 1 May 2011
Externally published	Yes

Keywords

P(P)OVER-BAR COLLISIONS
FRAGMENTATION
DECAYS
PROMPT
PSI

Access to Document

10.1140/epjc/s10052-011-1645-yLicence: CC BY-NC

Cite this

@article{896f1ec0dd034b4fb8232e1f63f990a5,

title = "Measurement of J/psi production in pp collisions at root s=7 TeV",

abstract = "The production of J/psi mesons in proton-proton collisions at root s = 7 TeV is studied with the LHCb detector at the LHC. The differential cross-section for prompt J/psi production is measured as a function of the J/psi transverse momentum p(T) and rapidity y in the fiducial region p(T) is an element of [0; 14] GeV/c and y is an element of [2.0; 4.5]. The differential cross-section and fraction of J/psi from b-hadron decays are also measured in the same p(T) and y ranges. The analysis is based on a data sample corresponding to an integrated luminosity of 5.2 pb(-1). The measured cross-sections integrated over the fiducial region are 10.52 +/- 0.04 +/- 1.40(-2.20)(+1.64) mu b for prompt J/psi production and 1.14 +/- 0.01 +/- 0.16 mu b for J/psi from b-hadron decays, where the first uncertainty is statistical and the second systematic. The prompt J/psi production cross-section is obtained assuming no J/psi polarisation and the third error indicates the acceptance uncertainty due to this assumption.",

keywords = "P(P)OVER-BAR COLLISIONS, FRAGMENTATION, DECAYS, PROMPT, PSI",

author = "R. Aaij and B. Adeva and M. Adinolfi and C. Adrover and A. Affolder and Z. Ajaltouni and J. Albrecht and F. Alessio and M. Alexander and P.A. Cartelle and A.A. Alves and S. Amato and Y. Amhis and J. Amoraal and J. Anderson and R.B. Appleby and O.A. Gutierrez and L. Arrabito and M. Artuso and E. Aslanides and G. Auriemma and S. Bachmann and D.S. Bailey and V. Balagura and W. Baldini and R.J. Barlow and C. Barschel and S. Barsuk and A. Bates and C. Bauer and T. Bauer and A. Bay and I. Bediaga and K. Belous and I. Belyaev and E. Ben-Haim and M. Benayoun and G. Bencivenni and R. Bernet and M.O. Bettler and {van Beuzekom}, M. and S. Bifani and A. Bizzeti and P.M. Bjornstad and T. Blake and F. Blanc and C. Blanks and J. Blouw and S. Blusk and {van den Brand}, J. and {LHCb collaboration}",

year = "2011",

month = may,

day = "1",

doi = "10.1140/epjc/s10052-011-1645-y",

language = "English",

volume = "71",

journal = "European Physical Journal C",

issn = "1434-6044",

publisher = "Springer Verlag",

number = "5",

}

TY - JOUR

T1 - Measurement of J/psi production in pp collisions at root s=7 TeV

AU - Aaij, R.

AU - Adeva, B.

AU - Adinolfi, M.

AU - Adrover, C.

AU - Affolder, A.

AU - Ajaltouni, Z.

AU - Albrecht, J.

AU - Alessio, F.

AU - Alexander, M.

AU - Cartelle, P.A.

AU - Alves, A.A.

AU - Amato, S.

AU - Amhis, Y.

AU - Amoraal, J.

AU - Anderson, J.

AU - Appleby, R.B.

AU - Gutierrez, O.A.

AU - Arrabito, L.

AU - Artuso, M.

AU - Aslanides, E.

AU - Auriemma, G.

AU - Bachmann, S.

AU - Bailey, D.S.

AU - Balagura, V.

AU - Baldini, W.

AU - Barlow, R.J.

AU - Barschel, C.

AU - Barsuk, S.

AU - Bates, A.

AU - Bauer, C.

AU - Bauer, T.

AU - Bay, A.

AU - Bediaga, I.

AU - Belous, K.

AU - Belyaev, I.

AU - Ben-Haim, E.

AU - Benayoun, M.

AU - Bencivenni, G.

AU - Bernet, R.

AU - Bettler, M.O.

AU - van Beuzekom, M.

AU - Bifani, S.

AU - Bizzeti, A.

AU - Bjornstad, P.M.

AU - Blake, T.

AU - Blanc, F.

AU - Blanks, C.

AU - Blouw, J.

AU - Blusk, S.

AU - van den Brand, J.

AU - LHCb collaboration

PY - 2011/5/1

Y1 - 2011/5/1

N2 - The production of J/psi mesons in proton-proton collisions at root s = 7 TeV is studied with the LHCb detector at the LHC. The differential cross-section for prompt J/psi production is measured as a function of the J/psi transverse momentum p(T) and rapidity y in the fiducial region p(T) is an element of [0; 14] GeV/c and y is an element of [2.0; 4.5]. The differential cross-section and fraction of J/psi from b-hadron decays are also measured in the same p(T) and y ranges. The analysis is based on a data sample corresponding to an integrated luminosity of 5.2 pb(-1). The measured cross-sections integrated over the fiducial region are 10.52 +/- 0.04 +/- 1.40(-2.20)(+1.64) mu b for prompt J/psi production and 1.14 +/- 0.01 +/- 0.16 mu b for J/psi from b-hadron decays, where the first uncertainty is statistical and the second systematic. The prompt J/psi production cross-section is obtained assuming no J/psi polarisation and the third error indicates the acceptance uncertainty due to this assumption.

AB - The production of J/psi mesons in proton-proton collisions at root s = 7 TeV is studied with the LHCb detector at the LHC. The differential cross-section for prompt J/psi production is measured as a function of the J/psi transverse momentum p(T) and rapidity y in the fiducial region p(T) is an element of [0; 14] GeV/c and y is an element of [2.0; 4.5]. The differential cross-section and fraction of J/psi from b-hadron decays are also measured in the same p(T) and y ranges. The analysis is based on a data sample corresponding to an integrated luminosity of 5.2 pb(-1). The measured cross-sections integrated over the fiducial region are 10.52 +/- 0.04 +/- 1.40(-2.20)(+1.64) mu b for prompt J/psi production and 1.14 +/- 0.01 +/- 0.16 mu b for J/psi from b-hadron decays, where the first uncertainty is statistical and the second systematic. The prompt J/psi production cross-section is obtained assuming no J/psi polarisation and the third error indicates the acceptance uncertainty due to this assumption.

KW - P(P)OVER-BAR COLLISIONS

KW - FRAGMENTATION

KW - DECAYS

KW - PROMPT

KW - PSI

U2 - 10.1140/epjc/s10052-011-1645-y

DO - 10.1140/epjc/s10052-011-1645-y

M3 - Article

SN - 1434-6044

VL - 71

JO - European Physical Journal C

JF - European Physical Journal C

IS - 5

M1 - 1645

ER -