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 -