With an integrated luminosity of 2.47 fb-1 recorded by the ATLAS experiment at the LHC, the exclusive decays B0s?J/?? and B0d?J/?K*0 of B mesons produced in pp collisions at sqrt(s) = 7 TeV are used to determine the ratio of fragmentation fractions fs/fd. From the observed yields of 6640 ± 100(stat) ± 220(sys) B0s?J/?? events and 36290 ± 320(stat) ± 650(sys) B0d?J/?K*0 events, the quantity fsfdB(B0s?J/??)B(B0d?J/?K*0) is estimated to be 0.199 ± 0.004(stat) ± 0.010(sys).
Determination of the ratio of b-quark fragmentation fractions fs/fd in pp collisions at sqrt(s) = 7 TeV with the ATLAS detector
CHIODINI, GABRIELE;GORINI, Edoardo;PRIMAVERA, Margherita;SPAGNOLO, Stefania Antonia;VENTURA, Andrea
2015-01-01
Abstract
With an integrated luminosity of 2.47 fb-1 recorded by the ATLAS experiment at the LHC, the exclusive decays B0s?J/?? and B0d?J/?K*0 of B mesons produced in pp collisions at sqrt(s) = 7 TeV are used to determine the ratio of fragmentation fractions fs/fd. From the observed yields of 6640 ± 100(stat) ± 220(sys) B0s?J/?? events and 36290 ± 320(stat) ± 650(sys) B0d?J/?K*0 events, the quantity fsfdB(B0s?J/??)B(B0d?J/?K*0) is estimated to be 0.199 ± 0.004(stat) ± 0.010(sys).File in questo prodotto:
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