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

http://repository.vnu.edu.vn/handle/VNU_123/29748

Measurements of the cross section for producing b quarks in the reaction pp -> b (b) over barX are reported in 7 and 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 and 154.3 +/- 1.5 +/- 14.3 +/- mu b for 7 and 13 TeV.

The ratio is 2.14 +/- 0.02 +/- 0.13, where the quoted uncertainties are statistical and 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.

Title: 

	Measurement of the b- Quark Production Cross Section in 7 and 13 TeV pp Collisions
Authors:	Aaij, R. Adeva, B. Adinolfi, M.
Keywords:	ROOT-S=7 TEV DECAYS RATIO LHC QCD
Issue Date:	2017
Publisher:	AMER PHYSICAL SOC, ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
Citation:	ISIKNOWLEDGE
Abstract:	Measurements of the cross section for producing b quarks in the reaction pp -> b (b) over barX are reported in 7 and 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 and 154.3 +/- 1.5 +/- 14.3 +/- mu b for 7 and 13 TeV. The ratio is 2.14 +/- 0.02 +/- 0.13, where the quoted uncertainties are statistical and 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.
Description:	TNS07072 ; PHYSICAL REVIEW LETTERS Volume: 118 Issue: 5 Article Number: 052002 Published: FEB 3 2017
URI:	http://repository.vnu.edu.vn/handle/VNU_123/29748
ISSN:	0031-9007 1079-7114
Appears in Collections:	Bài báo của ĐHQGHN trong Web of Science