Measurement of associated production of a W boson and a charm quark in proton-proton collisions at √{s} = 13 {Te} {V}
Abstract
Measurements are presented of associated production of a W boson and a charm quark (W+c) in proton-proton collisions at a center-of-mass energy of 13 {Te} {V}. The data correspond to an integrated luminosity of 35.7 {fb}^{-1} collected by the CMS experiment at the CERN LHC. The W bosons are identified by their decay into a muon and a neutrino. The charm quarks are tagged via the full reconstruction of {D^{*}(2010)^{± }} mesons that decay via {D^{*}(2010)^{± }}→ D^0 + {π ^{± }}→ K^{∓ } + {π ^{± }}+ {π ^{± }}. A cross section is measured in the fiducial region defined by the muon transverse momentum pT ^{μ } > 26 {Ge} {V} , muon pseudorapidity |η ^{μ } | < 2.4, and charm quark transverse momentum pT c > 5 {Ge} {V} . The inclusive cross section for this kinematic range is σ (W+c)=1026± 31 {(stat)} +76 -72 {(syst)} { pb} . The cross section is also measured differentially as a function of the pseudorapidity of the muon from the W boson decay. These measurements are compared with theoretical predictions and are used to probe the strange quark content of the proton.
- Publication:
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European Physical Journal C
- Pub Date:
- March 2019
- DOI:
- 10.1140/epjc/s10052-019-6752-1
- Bibcode:
- 2019EPJC...79..269S