Measurements of the cross section for producing b quarks in the reaction pp -> b (b) over barX are reported in 7, 13 TeV collisions at the LHC as a function of the pseudorapidity. in the range 2 < eta < 5 covered by the acceptance of the LHCb experiment. The measurements are done using semileptonic decays of b-flavored hadrons decaying into a ground-state charmed hadron in association with a muon. The cross sections in the covered. range are 72.0 +/- 0.3 +/- 6.8, 154.3 +/- 1.5 +/- 14.3 +/- mu b for 7, 13 TeV. The ratio is 2.14 +/- 0.02 +/- 0.13 where the quoted uncertainties are statistical, systematic respectively. The agreement with theoretical expectation is good at 7 TeV but differs somewhat at 13 TeV. The measured ratio of cross sections is larger at lower eta than the model prediction.

Measurement of the b- Quark Production Cross Section in 7, 13 TeV pp Collisions

Dettori F.;Lai A.;Manca G.;Oldeman R.;Saitta B.;
2017-01-01

Abstract

Measurements of the cross section for producing b quarks in the reaction pp -> b (b) over barX are reported in 7, 13 TeV collisions at the LHC as a function of the pseudorapidity. in the range 2 < eta < 5 covered by the acceptance of the LHCb experiment. The measurements are done using semileptonic decays of b-flavored hadrons decaying into a ground-state charmed hadron in association with a muon. The cross sections in the covered. range are 72.0 +/- 0.3 +/- 6.8, 154.3 +/- 1.5 +/- 14.3 +/- mu b for 7, 13 TeV. The ratio is 2.14 +/- 0.02 +/- 0.13 where the quoted uncertainties are statistical, systematic respectively. The agreement with theoretical expectation is good at 7 TeV but differs somewhat at 13 TeV. The measured ratio of cross sections is larger at lower eta than the model prediction.
2017
root-s=7 tev; decays; ratio; LHC; QCD
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11584/240341
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