Measurement of the cross-section ratio sigma(chi(c2))/sigma(chi(c1)) for prompt chi(c) production at root s=7 TeV LHCb Collaboration

LHCb collaboration; Valerie Gibson

doi:10.1016/j.physletb.2012.06.077

Measurement of the cross-section ratio sigma(chi(c2))/sigma(chi(c1)) for prompt chi(c) production at root s=7 TeV LHCb Collaboration

LHCb collaboration
, Valerie Gibson^*

^*Corresponding author for this work

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

Abstract

The prompt production of the charmonium chi(c1) and chi(c2) mesons has been studied in proton-proton collisions at the Large Hadron Collider at a centre-of-mass energy of root s = 7 TeV. The chi(c) mesons are identified through their decays chi(c) -> J/psi gamma with J/psi -> mu(+)mu(-) using 36 pb(-1) of data collected by the LHCb detector in 2010. The ratio of the prompt production cross-sections for the two chi(c) spin states. sigma(chi(c2))/sigma(chi(c1)), has been determined as a function of the J/psi transverse momentum, p(T)(J/psi), in the range from 2 to 15 GeV/c. The results are in agreement with the next-to-leading order non-relativistic QCD model at high p(T)(J/psi) and lie consistently above the pure leading-order colour-singlet prediction. (C) 2012 CERN. Published by Elsevier B.V. All rights reserved.

Original language	English
Pages (from-to)	215-223
Number of pages	9
Journal	Physics Letters B
Volume	714
Issue number	2-5
DOIs	https://doi.org/10.1016/j.physletb.2012.06.077
Publication status	Published - 14 Aug 2012
Externally published	Yes

Keywords

J/PSI-PRODUCTION
DECAY

Access to Document

10.1016/j.physletb.2012.06.077Licence: CC BY-NC-ND

Cite this

@article{bfc29d19c00c450b96a78670f4dbca57,

title = "Measurement of the cross-section ratio sigma(chi(c2))/sigma(chi(c1)) for prompt chi(c) production at root s=7 TeV LHCb Collaboration",

abstract = "The prompt production of the charmonium chi(c1) and chi(c2) mesons has been studied in proton-proton collisions at the Large Hadron Collider at a centre-of-mass energy of root s = 7 TeV. The chi(c) mesons are identified through their decays chi(c) -> J/psi gamma with J/psi -> mu(+)mu(-) using 36 pb(-1) of data collected by the LHCb detector in 2010. The ratio of the prompt production cross-sections for the two chi(c) spin states. sigma(chi(c2))/sigma(chi(c1)), has been determined as a function of the J/psi transverse momentum, p(T)(J/psi), in the range from 2 to 15 GeV/c. The results are in agreement with the next-to-leading order non-relativistic QCD model at high p(T)(J/psi) and lie consistently above the pure leading-order colour-singlet prediction. (C) 2012 CERN. Published by Elsevier B.V. All rights reserved.",

keywords = "J/PSI-PRODUCTION, DECAY",

author = "R. Aaij and C.A. Beteta 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 G. Alkhazov and P.A. Cartelle and A.A. Alves and S. Amato and Y. Amhis and J. Anderson and R.B. Appleby and O.A. Gutierrez and F. Archilli and L. Arrabito and A. Artamonov and M. Artuso and E. Aslanides and G. Auriemma and S. Bachmann and J.J. Back and D.S. Bailey and V. Balagura and W. Baldini and R.J. Barlow and C. Barschel and S. Barsuk and W. Barter and A. Bates and C. Bauer and T. Bauer and A. Bay and I. Bediaga and S. Belogurov and K. Belous and I. Belyaev and E. Ben-Haim and M. Benayoun and G. Bencivenni and S. Benson and J. Benton and R. Bernet and M.O. Bettler and \{van Beuzekom\}, M. and \{van den Brand\}, J. and \{LHCb collaboration\} and Valerie Gibson",

year = "2012",

month = aug,

day = "14",

doi = "10.1016/j.physletb.2012.06.077",

language = "English",

volume = "714",

pages = "215--223",

journal = "Physics Letters B",

issn = "0370-2693",

publisher = "Elsevier B.V.",

number = "2-5",

}

TY - JOUR

T1 - Measurement of the cross-section ratio sigma(chi(c2))/sigma(chi(c1)) for prompt chi(c) production at root s=7 TeV LHCb Collaboration

AU - Aaij, R.

AU - Beteta, C.A.

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 - Alkhazov, G.

AU - Cartelle, P.A.

AU - Alves, A.A.

AU - Amato, S.

AU - Amhis, Y.

AU - Anderson, J.

AU - Appleby, R.B.

AU - Gutierrez, O.A.

AU - Archilli, F.

AU - Arrabito, L.

AU - Artamonov, A.

AU - Artuso, M.

AU - Aslanides, E.

AU - Auriemma, G.

AU - Bachmann, S.

AU - Back, J.J.

AU - Bailey, D.S.

AU - Balagura, V.

AU - Baldini, W.

AU - Barlow, R.J.

AU - Barschel, C.

AU - Barsuk, S.

AU - Barter, W.

AU - Bates, A.

AU - Bauer, C.

AU - Bauer, T.

AU - Bay, A.

AU - Bediaga, I.

AU - Belogurov, S.

AU - Belous, K.

AU - Belyaev, I.

AU - Ben-Haim, E.

AU - Benayoun, M.

AU - Bencivenni, G.

AU - Benson, S.

AU - Benton, J.

AU - Bernet, R.

AU - Bettler, M.O.

AU - van Beuzekom, M.

AU - van den Brand, J.

AU - LHCb collaboration

AU - Gibson, Valerie

PY - 2012/8/14

Y1 - 2012/8/14

N2 - The prompt production of the charmonium chi(c1) and chi(c2) mesons has been studied in proton-proton collisions at the Large Hadron Collider at a centre-of-mass energy of root s = 7 TeV. The chi(c) mesons are identified through their decays chi(c) -> J/psi gamma with J/psi -> mu(+)mu(-) using 36 pb(-1) of data collected by the LHCb detector in 2010. The ratio of the prompt production cross-sections for the two chi(c) spin states. sigma(chi(c2))/sigma(chi(c1)), has been determined as a function of the J/psi transverse momentum, p(T)(J/psi), in the range from 2 to 15 GeV/c. The results are in agreement with the next-to-leading order non-relativistic QCD model at high p(T)(J/psi) and lie consistently above the pure leading-order colour-singlet prediction. (C) 2012 CERN. Published by Elsevier B.V. All rights reserved.

AB - The prompt production of the charmonium chi(c1) and chi(c2) mesons has been studied in proton-proton collisions at the Large Hadron Collider at a centre-of-mass energy of root s = 7 TeV. The chi(c) mesons are identified through their decays chi(c) -> J/psi gamma with J/psi -> mu(+)mu(-) using 36 pb(-1) of data collected by the LHCb detector in 2010. The ratio of the prompt production cross-sections for the two chi(c) spin states. sigma(chi(c2))/sigma(chi(c1)), has been determined as a function of the J/psi transverse momentum, p(T)(J/psi), in the range from 2 to 15 GeV/c. The results are in agreement with the next-to-leading order non-relativistic QCD model at high p(T)(J/psi) and lie consistently above the pure leading-order colour-singlet prediction. (C) 2012 CERN. Published by Elsevier B.V. All rights reserved.

KW - J/PSI-PRODUCTION

KW - DECAY

U2 - 10.1016/j.physletb.2012.06.077

DO - 10.1016/j.physletb.2012.06.077

M3 - Article

SN - 0370-2693

VL - 714

SP - 215

EP - 223

JO - Physics Letters B

JF - Physics Letters B

IS - 2-5

ER -

Measurement of the cross-section ratio sigma(chi(c2))/sigma(chi(c1)) for prompt chi(c) production at root s=7 TeV LHCb Collaboration

Abstract

Keywords

Access to Document

Fingerprint

Cite this