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.

Measurement of the B± production asymmetry and the CP asymmetry in B±→J/ψK± decays / Aaij, R., Adeva, B., Adinolfi, M., Ajaltouni, Z., Akar, S., Albrecht, J., Alessio, F., Alexander, M., Ali, S., Alkhazov, G., Alvarez Cartelle, P., Alves, A.A., Amato, S., Amerio, S., Amhis, Y., An, L., Anderlini, L., Andreassi, G., Andreotti, M., Andrews, J.E., et al.. - In: PHYSICAL REVIEW D. - ISSN 2470-0010. - 95:5(2017). [10.1103/PhysRevD.95.052005]

Measurement of the B± production asymmetry and the CP asymmetry in B±→J/ψK± decays

Capriotti, L.;Casse, G.;Sarti, A.;Sciubba, A.;
2017

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
2017
Branching fraction CP violation Flavor physics Rare decay Hadron-Hadron scattering (experiments)
01 Pubblicazione su rivista::01a Articolo in rivista
Measurement of the B± production asymmetry and the CP asymmetry in B±→J/ψK± decays / Aaij, R., Adeva, B., Adinolfi, M., Ajaltouni, Z., Akar, S., Albrecht, J., Alessio, F., Alexander, M., Ali, S., Alkhazov, G., Alvarez Cartelle, P., Alves, A.A., Amato, S., Amerio, S., Amhis, Y., An, L., Anderlini, L., Andreassi, G., Andreotti, M., Andrews, J.E., et al.. - In: PHYSICAL REVIEW D. - ISSN 2470-0010. - 95:5(2017). [10.1103/PhysRevD.95.052005]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/1074619
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