Measurement of upsilon production in pp collisions at root s=7 TeV

LHCb collaboration

doi:10.1140/epjc/s10052-012-2025-y

Measurement of upsilon production in pp collisions at root s=7 TeV

LHCb collaboration

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

Abstract

The production of Gamma (1S), Gamma (2S) and Gamma (3S) mesons in proton-proton collisions at the centre-of-mass energy of root s = 7 TeV is studied with the LHCb detector. The analysis is based on a data sample of 25 pb(-1) collected at the Large Hadron Collider. The Gamma mesons are reconstructed in the decay mode Gamma -> mu(+)mu(-) and the signal yields are extracted from a fit to the mu(+)mu(-) invariant mass distributions. The differential production cross-sections times dimuon branching fractions are measured as a function of the Gamma transverse momentum p(T) and rapidity y, over the range p(T) < 15 GeV/c and 2.0 < y < 4.5. The cross-sections times branching fractions, integrated over these kinematic ranges, are measured to besigma(pp -> Gamma (1S) X) x B(Gamma (1S) -> mu(+)mu(-))= 2.29+/-0.01+/-0.10(-0.37)(+0.19) nb,sigma(pp -> Gamma(2S) X x B(Gamma(2S) -> mu(+)mu(-))= 0.562+/-0.007+/-0.023(-0.092)(+0.048) nb,sigma(pp -> Gamma (3S) X) x B(Gamma (3S) -> mu(+)mu(-))= 0.283+/-0.005+/-0.012(-0.048)(+0.025) nb,where the first uncertainty is statistical, the second systematic and the third is due to the unknown polarisation of the three Gamma states.

Original language	English
Article number	2025
Number of pages	12
Journal	European Physical Journal C
Volume	72
Issue number	6
DOIs	https://doi.org/10.1140/epjc/s10052-012-2025-y
Publication status	Published - 1 Jun 2012
Externally published	Yes

Keywords

HADRONIC PRODUCTION
J-PSI
DECAY

Access to Document

10.1140/epjc/s10052-012-2025-yLicence: CC BY

Cite this

@article{ade0af59ae964006b6d10d8c2d2ddc2f,

title = "Measurement of upsilon production in pp collisions at root s=7 TeV",

abstract = "The production of Gamma (1S), Gamma (2S) and Gamma (3S) mesons in proton-proton collisions at the centre-of-mass energy of root s = 7 TeV is studied with the LHCb detector. The analysis is based on a data sample of 25 pb(-1) collected at the Large Hadron Collider. The Gamma mesons are reconstructed in the decay mode Gamma -> mu(+)mu(-) and the signal yields are extracted from a fit to the mu(+)mu(-) invariant mass distributions. The differential production cross-sections times dimuon branching fractions are measured as a function of the Gamma transverse momentum p(T) and rapidity y, over the range p(T) < 15 GeV/c and 2.0 < y < 4.5. The cross-sections times branching fractions, integrated over these kinematic ranges, are measured to besigma(pp -> Gamma (1S) X) x B(Gamma (1S) -> mu(+)mu(-))= 2.29+/-0.01+/-0.10(-0.37)(+0.19) nb,sigma(pp -> Gamma(2S) X x B(Gamma(2S) -> mu(+)mu(-))= 0.562+/-0.007+/-0.023(-0.092)(+0.048) nb,sigma(pp -> Gamma (3S) X) x B(Gamma (3S) -> mu(+)mu(-))= 0.283+/-0.005+/-0.012(-0.048)(+0.025) nb,where the first uncertainty is statistical, the second systematic and the third is due to the unknown polarisation of the three Gamma states.",

keywords = "HADRONIC PRODUCTION, J-PSI, 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}",

year = "2012",

month = jun,

day = "1",

doi = "10.1140/epjc/s10052-012-2025-y",

language = "English",

volume = "72",

journal = "European Physical Journal C",

issn = "1434-6044",

publisher = "Springer Verlag",

number = "6",

}

TY - JOUR

T1 - Measurement of upsilon production in pp collisions at root s=7 TeV

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

PY - 2012/6/1

Y1 - 2012/6/1

N2 - The production of Gamma (1S), Gamma (2S) and Gamma (3S) mesons in proton-proton collisions at the centre-of-mass energy of root s = 7 TeV is studied with the LHCb detector. The analysis is based on a data sample of 25 pb(-1) collected at the Large Hadron Collider. The Gamma mesons are reconstructed in the decay mode Gamma -> mu(+)mu(-) and the signal yields are extracted from a fit to the mu(+)mu(-) invariant mass distributions. The differential production cross-sections times dimuon branching fractions are measured as a function of the Gamma transverse momentum p(T) and rapidity y, over the range p(T) < 15 GeV/c and 2.0 < y < 4.5. The cross-sections times branching fractions, integrated over these kinematic ranges, are measured to besigma(pp -> Gamma (1S) X) x B(Gamma (1S) -> mu(+)mu(-))= 2.29+/-0.01+/-0.10(-0.37)(+0.19) nb,sigma(pp -> Gamma(2S) X x B(Gamma(2S) -> mu(+)mu(-))= 0.562+/-0.007+/-0.023(-0.092)(+0.048) nb,sigma(pp -> Gamma (3S) X) x B(Gamma (3S) -> mu(+)mu(-))= 0.283+/-0.005+/-0.012(-0.048)(+0.025) nb,where the first uncertainty is statistical, the second systematic and the third is due to the unknown polarisation of the three Gamma states.

AB - The production of Gamma (1S), Gamma (2S) and Gamma (3S) mesons in proton-proton collisions at the centre-of-mass energy of root s = 7 TeV is studied with the LHCb detector. The analysis is based on a data sample of 25 pb(-1) collected at the Large Hadron Collider. The Gamma mesons are reconstructed in the decay mode Gamma -> mu(+)mu(-) and the signal yields are extracted from a fit to the mu(+)mu(-) invariant mass distributions. The differential production cross-sections times dimuon branching fractions are measured as a function of the Gamma transverse momentum p(T) and rapidity y, over the range p(T) < 15 GeV/c and 2.0 < y < 4.5. The cross-sections times branching fractions, integrated over these kinematic ranges, are measured to besigma(pp -> Gamma (1S) X) x B(Gamma (1S) -> mu(+)mu(-))= 2.29+/-0.01+/-0.10(-0.37)(+0.19) nb,sigma(pp -> Gamma(2S) X x B(Gamma(2S) -> mu(+)mu(-))= 0.562+/-0.007+/-0.023(-0.092)(+0.048) nb,sigma(pp -> Gamma (3S) X) x B(Gamma (3S) -> mu(+)mu(-))= 0.283+/-0.005+/-0.012(-0.048)(+0.025) nb,where the first uncertainty is statistical, the second systematic and the third is due to the unknown polarisation of the three Gamma states.

KW - HADRONIC PRODUCTION

KW - J-PSI

KW - DECAY

U2 - 10.1140/epjc/s10052-012-2025-y

DO - 10.1140/epjc/s10052-012-2025-y

M3 - Article

SN - 1434-6044

VL - 72

JO - European Physical Journal C

JF - European Physical Journal C

IS - 6

M1 - 2025

ER -