Measurement of differential b b ¯ $$ b\overline{b} $$ - and c c ¯ $$ c\overline{c} $$ -dijet cross-sections in the forward region of pp collisions at s $$ \sqrt{s} $$ = 13 TeV
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Author(s)
Aaij, R.
Abellán Beteta, C.
Ackernley, T.
Adeva, B.
Adinolfi, M.
Afsharnia, H.
Aidala, C. A
Aiola, S.
Ajaltouni, Z.
Akar, S.
Date Issued
February 2, 2021
Publisher
Springer Berlin Heidelberg
Citation
Journal of High Energy Physics. 2021 Feb 02;2021(2):23
Version
Final published version
Abstract
Abstract
The inclusive
b
b
¯
$$ b\overline{b} $$
- and
c
c
¯
$$ c\overline{c} $$
-dijet production cross-sections in the forward region of pp collisions are measured using a data sample collected with the LHCb detector at a centre-of-mass energy of 13 TeV in 2016. The data sample corresponds to an integrated luminosity of 1.6 fb−1. Differential cross-sections are measured as a function of the transverse momentum and of the pseudorapidity of the leading jet, of the rapidity difference between the jets, and of the dijet invariant mass. A fiducial region for the measurement is defined by requiring that the two jets originating from the two b or c quarks are emitted with transverse momentum greater than 20 GeV/c, pseudorapidity in the range 2.2 < η < 4.2, and with a difference in the azimuthal angle between the two jets greater than 1.5. The integrated
b
b
¯
$$ b\overline{b} $$
-dijet cross-section is measured to be 53.0 ± 9.7 nb, and the total
c
c
¯
$$ c\overline{c} $$
-dijet cross-section is measured to be 73 ± 16 nb. The ratio between
c
c
¯
$$ c\overline{c} $$
- and
b
b
¯
$$ b\overline{b} $$
-dijet cross-sections is also measured and found to be 1.37 ± 0.27. The results are in agreement with theoretical predictions at next-to-leading order.
MIT Department
Massachusetts Institute of Technology. Department of Physics
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DOI of Published Version
https://doi.org/10.1007/JHEP02(2021)023
