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Measurement of the B± production asymmetry and the CP asymmetry in B±→J/ψK± decays
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LHCb Collaboration (Including: Back, J. J., Blake, Thomas, Costa Sobral, Cayo, Crocombe, Andrew, Gershon, T. J., Kreps, Michal, Latham, Thomas, Loh, David, Mathad, Abhijit , O'Hanlon, Daniel P., Poluektov, Anton, Qian, W., Wallace, Charlotte and Wicht, Jean). (2017) Measurement of the B± production asymmetry and the CP asymmetry in B±→J/ψK± decays. Physical Review D (Particles, Fields, Gravitation and Cosmology), 95 (5). doi:10.1103/PhysRevD.95.052005
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Official URL: http://dx.doi.org/10.1103/PhysRevD.95.052005
Abstract
The B± meson production asymmetry in pp collisions is measured using B+→¯D0π+ decays. The data were recorded by the LHCb experiment during Run 1 of the LHC at center-of-mass energies of √s=7 and 8 TeV. The production asymmetries, integrated over transverse momenta in the range 2<pT<30 GeV/c, and rapidities in the range 2.1<y<4.5 are measured to be Aprod(B+,√s=7 TeV)=(−0.41±0.49±0.10)×10−2, Aprod(B+,√s=8 TeV)=(−0.53±0.31±0.10)×10−2, where the first uncertainties are statistical and the second are systematic. These production asymmetries are used to correct the raw asymmetries of B+→J/ψK+ decays, thus allowing a measurement of the CP asymmetry, ACP(B+→J/ψK+)=(0.09±0.27±0.07)×10−2.
| Item Type: | Journal Article | ||||||||||||||||||
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| Subjects: | Q Science > QC Physics | ||||||||||||||||||
| Divisions: | Faculty of Science > Physics | ||||||||||||||||||
| Library of Congress Subject Headings (LCSH): | Large Hadron Collider (France and Switzerland), Particles (Nuclear physics), Beta decay | ||||||||||||||||||
| Journal or Publication Title: | Physical Review D (Particles, Fields, Gravitation and Cosmology) | ||||||||||||||||||
| Publisher: | American Physical Society | ||||||||||||||||||
| ISSN: | 1550-7998 | ||||||||||||||||||
| Official Date: | 21 March 2017 | ||||||||||||||||||
| Dates: |
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| Volume: | 95 | ||||||||||||||||||
| Number: | 5 | ||||||||||||||||||
| DOI: | 10.1103/PhysRevD.95.052005 | ||||||||||||||||||
| Status: | Peer Reviewed | ||||||||||||||||||
| Publication Status: | Published | ||||||||||||||||||
| Access rights to Published version: | Open Access | ||||||||||||||||||
| RIOXX Funder/Project Grant: |
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