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Measurement of σχc2B(χc2 -> J/ψγ)/σχc1B(χc1 -> J/ψγ) in pp Collisions at s√=1.96  TeV

CollaborationWith : Campanelli, Mario / Clark, Allan Geoffrey / Donega, Mauro / Moed, Shulamit / Sfyrla, Anna / Vallecorsa, Sofia / Wu, Xin
Published in Physical Review Letters. 2007, vol. 98, no. 23, p. 232001
Abstract We measure the ratio of cross section times branching fraction, Rp=σχc2B(χc2→J/ψγ)/σχc1B(χc1→J/ψγ), in 1.1  fb−1 of pp collisions at s√=1.96  TeV. This measurement covers the kinematic range pT(J/ψ)>4.0  GeV/c, |η(J/ψ)<1.0, and pT(γ)>1.0  GeV/c. For events due to prompt processes, we find Rp=0.395±0.016(stat)±0.015(syst). This result represents a significant improvement in precision over previous measurements of prompt χc1,2 hadro production.
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CDF COLLABORATION. Measurement of σχc2B(χc2 -> J/ψγ)/σχc1B(χc1 -> J/ψγ) in pp Collisions at s√=1.96  TeV. In: Physical Review Letters, 2007, vol. 98, n° 23, p. 232001. https://archive-ouverte.unige.ch/unige:38405

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Deposited on : 2014-07-01

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