Open access
Datum
2012-02Typ
- Journal Article
ETH Bibliographie
yes
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Abstract
A measurement of the J/ψ and ψ(2S) production cross sections in pp collisions at s√=7TeV with the CMS experiment at the LHC is presented. The data sample corresponds to an integrated luminosity of 37 pb−1. Using a fit to the invariant mass and decay length distributions, production cross sections have been measured separately for prompt and non-prompt charmonium states, as a function of the meson transverse momentum in several rapidity ranges and integrated in the kinematical regions considered in this study. In addition, cross sections restricted to the acceptance of the CMS detector are given, which are not affected by the polarization of the charmonium states. The ratio of the differential production cross sections of the two states, where systematic uncertainties largely cancel, is also determined. The branching fraction of the inclusive B → ψ(2S)X decay is extracted from the ratio of the non-prompt cross sections to be:
B(B→ψ(2S)X)=(3.08±0.12(stat.+syst.)±0.13(theor.)±0.42(BPDG))×10−3.B(B→ψ(2S)X)=(3.08±0.12(stat.+syst.)±0.13(theor.)±0.42(BPDG))×10−3. Mehr anzeigen
Persistenter Link
https://doi.org/10.3929/ethz-b-000051286Publikationsstatus
publishedExterne Links
Zeitschrift / Serie
Journal of High Energy PhysicsBand
Seiten / Artikelnummer
Verlag
SpringerThema
Hadron-Hadron ScatteringOrganisationseinheit
03381 - Pauss, Felicitas (emeritus)
03593 - Dissertori, Günther / Dissertori, Günther
03904 - Wallny, Rainer / Wallny, Rainer
08803 - Grab, Christoph (Tit.Prof.)
ETH Bibliographie
yes
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