A search for CP violation in Cabibbo-suppressed D± → K0S K± and Ds± → K0S π± decays is performed using pp collision data, corresponding to an integrated luminosity of 3 fb^−1, recorded by the LHCb experiment. The individual CP-violating asymmetries are measured to be A_{CP}^{D± → K0S K±} = (+0.03 ± 0.17 ± 0.14)%, A_{CP}^{Ds± → K0S π±} = (+0.38 ± 0.46 ± 0.17)%, assuming that CP violation in the Cabibbo-favoured decays is negligible. A combination of the measured asymmetries for the four decay modes D(s)± → K0S K± and D(s)± → K0S π± gives the sum A_{CP}^{D± → K0S K±} + A_{CP}^{Ds± → K0S π±} = (+0.41 ± 0.49 ± 0.26)%. In all cases, the first uncertainties are statistical and the second systematic. The results represent the most precise measurements of these asymmetries to date and show no evidence for CP violation.

R. Aaij, B. Adeva, M. Adinolfi, A. Affolder, Z. Ajaltouni, S. Akar, et al. (2014). Search for CP Violation in D± → K0S K± and Ds± → K0S π± Decays. JOURNAL OF HIGH ENERGY PHYSICS, 2014(10), 0-18 [10.1007/JHEP10(2014)025].

Search for CP Violation in D± → K0S K± and Ds± → K0S π± Decays

CARBONE, ANGELO;GALLI, DOMENICO;MOGGI, NICCOLO';MUSSINI, MANUEL;PATRIGNANI, CLAUDIA;PERAZZINI, STEFANO;VAGNONI, VINCENZO MARIA;ZANGOLI, MARIA;
2014

Abstract

A search for CP violation in Cabibbo-suppressed D± → K0S K± and Ds± → K0S π± decays is performed using pp collision data, corresponding to an integrated luminosity of 3 fb^−1, recorded by the LHCb experiment. The individual CP-violating asymmetries are measured to be A_{CP}^{D± → K0S K±} = (+0.03 ± 0.17 ± 0.14)%, A_{CP}^{Ds± → K0S π±} = (+0.38 ± 0.46 ± 0.17)%, assuming that CP violation in the Cabibbo-favoured decays is negligible. A combination of the measured asymmetries for the four decay modes D(s)± → K0S K± and D(s)± → K0S π± gives the sum A_{CP}^{D± → K0S K±} + A_{CP}^{Ds± → K0S π±} = (+0.41 ± 0.49 ± 0.26)%. In all cases, the first uncertainties are statistical and the second systematic. The results represent the most precise measurements of these asymmetries to date and show no evidence for CP violation.
2014
R. Aaij, B. Adeva, M. Adinolfi, A. Affolder, Z. Ajaltouni, S. Akar, et al. (2014). Search for CP Violation in D± → K0S K± and Ds± → K0S π± Decays. JOURNAL OF HIGH ENERGY PHYSICS, 2014(10), 0-18 [10.1007/JHEP10(2014)025].
R. Aaij; B. Adeva; M. Adinolfi; A. Affolder; Z. Ajaltouni; S. Akar; J. Albrecht; F. Alessio; M. Alexander; S. Ali; G. Alkhazov; P. Alvarez Cartelle; A...espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/357924
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