Measurement of psi(2S) meson production in pp collisions at root s = 7 TeV

LHCb collaboration

doi:10.1140/epjc/s10052-012-2100-4

Measurement of psi(2S) meson production in pp collisions at root s = 7 TeV

LHCb collaboration

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

Abstract

The differential cross-section for the inclusive production of psi(2S) mesons in pp collisions at &RADIC s = 7 TeV has been measured with the LHCb detector. The data sample corresponds to an integrated luminosity of 36 pb(-1). The psi(2S) mesons are reconstructed in the decay channels psi(2S)-> mu(+)mu(-) and psi(2S) -> J/psi&PI+&PI-, with the J/psi meson decaying into two muons. Results are presented both for promptly produced psi(2S) mesons and for those originating from b-hadron decays. In the kinematic range pT(psi(2S)) <= 16 GeV/c and 2 < y(psi(2S)) <= 4.5 we measuresigma(prompt)(psi(2S))= 1.44 +/- 0.01 (stat) +/- 0.12 (syst)(-0.40)(+0.20) (pol) mu b, &SIGMA(b)(psi(2S)) = 0.25 +/- 0.01 (stat) +/- 0.02 (syst) mu b,where the last uncertainty on the prompt cross-section is due to the unknown psi(2S) polarization. Recent QCD calculations are found to be in good agreement with our measurements. Combining the present result with the LHCb J/psi measurements we determine the inclusive branching fractionB (b ->psi(2S)X)= (2.73 +/- 0.06 (stat) +/- 0.16 (syst) +/- 0.24 (BF))* 10(-3),where the last uncertainty is due to the B(b -> J/psi X), B(J/psi -> mu(+)mu(-) and B(psi(2S) -> e(+)e(-)) branching fraction uncertainties.

Original language	English
Article number	2100
Number of pages	12
Journal	European Physical Journal C
Volume	72
Issue number	8
DOIs	https://doi.org/10.1140/epjc/s10052-012-2100-4
Publication status	Published - 1 Aug 2012
Externally published	Yes

Keywords

DECAY

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Cite this

@article{6a41c9e7023c44d9b6fbfde5ad3d7fa6,

title = "Measurement of psi(2S) meson production in pp collisions at root s = 7 TeV",

abstract = "The differential cross-section for the inclusive production of psi(2S) mesons in pp collisions at &RADIC s = 7 TeV has been measured with the LHCb detector. The data sample corresponds to an integrated luminosity of 36 pb(-1). The psi(2S) mesons are reconstructed in the decay channels psi(2S)-> mu(+)mu(-) and psi(2S) -> J/psi&PI+&PI-, with the J/psi meson decaying into two muons. Results are presented both for promptly produced psi(2S) mesons and for those originating from b-hadron decays. In the kinematic range pT(psi(2S)) <= 16 GeV/c and 2 < y(psi(2S)) <= 4.5 we measuresigma(prompt)(psi(2S))= 1.44 +/- 0.01 (stat) +/- 0.12 (syst)(-0.40)(+0.20) (pol) mu b, &SIGMA(b)(psi(2S)) = 0.25 +/- 0.01 (stat) +/- 0.02 (syst) mu b,where the last uncertainty on the prompt cross-section is due to the unknown psi(2S) polarization. Recent QCD calculations are found to be in good agreement with our measurements. Combining the present result with the LHCb J/psi measurements we determine the inclusive branching fractionB (b ->psi(2S)X)= (2.73 +/- 0.06 (stat) +/- 0.16 (syst) +/- 0.24 (BF))* 10(-3),where the last uncertainty is due to the B(b -> J/psi X), B(J/psi -> mu(+)mu(-) and B(psi(2S) -> e(+)e(-)) branching fraction uncertainties.",

keywords = "DECAY",

author = "R. Aaij and {Abellan Beteta}, C. 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 {Alvarez Cartelle}, P. 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. Aslanides 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 = aug,

day = "1",

doi = "10.1140/epjc/s10052-012-2100-4",

language = "English",

volume = "72",

journal = "European Physical Journal C",

issn = "1434-6044",

publisher = "Springer Verlag",

number = "8",

}

TY - JOUR

T1 - Measurement of psi(2S) meson production in pp collisions at root s = 7 TeV

AU - Aaij, R.

AU - Abellan Beteta, C.

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 - Alvarez Cartelle, P.

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 - Aslanides, 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 - 2012/8/1

Y1 - 2012/8/1

N2 - The differential cross-section for the inclusive production of psi(2S) mesons in pp collisions at &RADIC s = 7 TeV has been measured with the LHCb detector. The data sample corresponds to an integrated luminosity of 36 pb(-1). The psi(2S) mesons are reconstructed in the decay channels psi(2S)-> mu(+)mu(-) and psi(2S) -> J/psi&PI+&PI-, with the J/psi meson decaying into two muons. Results are presented both for promptly produced psi(2S) mesons and for those originating from b-hadron decays. In the kinematic range pT(psi(2S)) <= 16 GeV/c and 2 < y(psi(2S)) <= 4.5 we measuresigma(prompt)(psi(2S))= 1.44 +/- 0.01 (stat) +/- 0.12 (syst)(-0.40)(+0.20) (pol) mu b, &SIGMA(b)(psi(2S)) = 0.25 +/- 0.01 (stat) +/- 0.02 (syst) mu b,where the last uncertainty on the prompt cross-section is due to the unknown psi(2S) polarization. Recent QCD calculations are found to be in good agreement with our measurements. Combining the present result with the LHCb J/psi measurements we determine the inclusive branching fractionB (b ->psi(2S)X)= (2.73 +/- 0.06 (stat) +/- 0.16 (syst) +/- 0.24 (BF))* 10(-3),where the last uncertainty is due to the B(b -> J/psi X), B(J/psi -> mu(+)mu(-) and B(psi(2S) -> e(+)e(-)) branching fraction uncertainties.

AB - The differential cross-section for the inclusive production of psi(2S) mesons in pp collisions at &RADIC s = 7 TeV has been measured with the LHCb detector. The data sample corresponds to an integrated luminosity of 36 pb(-1). The psi(2S) mesons are reconstructed in the decay channels psi(2S)-> mu(+)mu(-) and psi(2S) -> J/psi&PI+&PI-, with the J/psi meson decaying into two muons. Results are presented both for promptly produced psi(2S) mesons and for those originating from b-hadron decays. In the kinematic range pT(psi(2S)) <= 16 GeV/c and 2 < y(psi(2S)) <= 4.5 we measuresigma(prompt)(psi(2S))= 1.44 +/- 0.01 (stat) +/- 0.12 (syst)(-0.40)(+0.20) (pol) mu b, &SIGMA(b)(psi(2S)) = 0.25 +/- 0.01 (stat) +/- 0.02 (syst) mu b,where the last uncertainty on the prompt cross-section is due to the unknown psi(2S) polarization. Recent QCD calculations are found to be in good agreement with our measurements. Combining the present result with the LHCb J/psi measurements we determine the inclusive branching fractionB (b ->psi(2S)X)= (2.73 +/- 0.06 (stat) +/- 0.16 (syst) +/- 0.24 (BF))* 10(-3),where the last uncertainty is due to the B(b -> J/psi X), B(J/psi -> mu(+)mu(-) and B(psi(2S) -> e(+)e(-)) branching fraction uncertainties.

KW - DECAY

U2 - 10.1140/epjc/s10052-012-2100-4

DO - 10.1140/epjc/s10052-012-2100-4

M3 - Article

SN - 1434-6044

VL - 72

JO - European Physical Journal C

JF - European Physical Journal C

IS - 8

M1 - 2100

ER -