Please use this identifier to cite or link to this item: http://earchive.tpu.ru/handle/11683/57783
Title: Measurement of the time-integrated CP asymmetry in D0 → K S 0 K S 0 decays
Authors: Aaij, Roel
Adeva, Bernardo
Adinolfi, Marco
Panshin, Gennady Leonidovich
Strokov, Sergey Aleksandrovich
Vagner, Aleksandr Rudolfovich
Keywords: физика; адронное взаимодействие
Issue Date: 2018
Publisher: Томский политехнический университет
Citation: Measurement of the time-integrated CP asymmetry in D0 → K S 0 K S 0 decays / R. Aaij [et al.] // Journal of High Energy Physics. — 2018. — № 11. — [48, 18 p.].
Abstract: A measurement of the time-integrated CP asymmetry in D0 → K S 0 K S 0 decays is reported. The data correspond to an integrated luminosity of about 2 fb−1 collected in 2015-2016 by the LHCb collaboration in pp collisions at a centre-of-mass energy of 13 TeV. The D0 candidate is required to originate from a D*+ → D0π+ decay, allowing the determination of the flavour of the D0 meson using the pion charge. The D0 → K+K− decay, which has a well measured CPasymmetry, is used as a calibration channel. The CP asymmetryfor D0 → K S 0 K S 0 is measured to beACP(D0→K0SK0S)=(4.3±3.4±1.0)%,ACP(D0→KS0KS0)=(4.3±3.4±1.0)%, where the first uncertainty is statistical and the second is systematic. This result is combined with the previous LHCb measurement at lower centre-of-mass energies to obtainACP(D0→K0SK0S)=(2.3±2.8±0.9)%.
URI: http://earchive.tpu.ru/handle/11683/57783
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