The first measurements of the forward-backward asymmetry of the dimuon pair (AFB), the triple-product asymmetry (A2φ), and the charge-parity-conjugation asymmetry (ACP), in D0→π+π-μ+μ- and D0→K+K-μ+μ- decays are reported. They are performed using data from proton-proton collisions collected with the LHCb experiment from 2011 to 2016, corresponding to a total integrated luminosity of 5 fb-1. The asymmetries are measured to be AFB(D0→π+π-μ+μ-) = (3.3 ± 3.7 ± 0.6)%, A2φ(D0→π+π-μ+μ-) = (-0.6 ± 3.7 ± 0.6)%, ACP(D0→π+π-μ+μ-) = (4.9 ± 3.8 ± 0.7)%, AFB(D0→K+K-μ+μ-) = (0 ± 11 ± 2)%, A2φ(D0→K+K-μ+μ-) = (9 ± 11 ± 1)%, ACP(D0→K+K-μ+μ-) = (0 ± 11 ± 2)%, where the first uncertainty is statistical and the second systematic. The asymmetries are also measured as a function of the dimuon invariant mass. The results are consistent with the standard model predictions.

Aaij, R., Adeva, B., Adinolfi, M., Aidala, C., Ajaltouni, Z., Akar, S., et al. (2018). Measurement of Angular and CP Asymmetries in D0 →π+π-μ+μ- and D0 →k+K-μ+μ- Decays. PHYSICAL REVIEW LETTERS, 121(9), 091801 [10.1103/PhysRevLett.121.091801].

Measurement of Angular and CP Asymmetries in D0 →π+π-μ+μ- and D0 →k+K-μ+μ- Decays

Belloli, N.;Borsato, M.;Calvi, M.;Carniti, P.;Cassina, L.;Fazzini, D.;Gotti, C.;Martinelli, M.;Matteuzzi, C.;Petruzzo, M.;
2018

Abstract

The first measurements of the forward-backward asymmetry of the dimuon pair (AFB), the triple-product asymmetry (A2φ), and the charge-parity-conjugation asymmetry (ACP), in D0→π+π-μ+μ- and D0→K+K-μ+μ- decays are reported. They are performed using data from proton-proton collisions collected with the LHCb experiment from 2011 to 2016, corresponding to a total integrated luminosity of 5 fb-1. The asymmetries are measured to be AFB(D0→π+π-μ+μ-) = (3.3 ± 3.7 ± 0.6)%, A2φ(D0→π+π-μ+μ-) = (-0.6 ± 3.7 ± 0.6)%, ACP(D0→π+π-μ+μ-) = (4.9 ± 3.8 ± 0.7)%, AFB(D0→K+K-μ+μ-) = (0 ± 11 ± 2)%, A2φ(D0→K+K-μ+μ-) = (9 ± 11 ± 1)%, ACP(D0→K+K-μ+μ-) = (0 ± 11 ± 2)%, where the first uncertainty is statistical and the second systematic. The asymmetries are also measured as a function of the dimuon invariant mass. The results are consistent with the standard model predictions.
Articolo in rivista - Articolo scientifico
Physics and Astronomy (all)
English
2018
121
9
091801
091801
none
Aaij, R., Adeva, B., Adinolfi, M., Aidala, C., Ajaltouni, Z., Akar, S., et al. (2018). Measurement of Angular and CP Asymmetries in D0 →π+π-μ+μ- and D0 →k+K-μ+μ- Decays. PHYSICAL REVIEW LETTERS, 121(9), 091801 [10.1103/PhysRevLett.121.091801].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/215447
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