The D0 → K0SK0S decay is a promising discovery channel for CP violation in charm. A prediction based on the Standard Model gives an upper limit for the CP asymmetry of about 1% and further enhancements could result from contributions from physics beyond the Standard Model. A preliminary measurement of the time-integrated CP asymmetry in prompt D0 → K0SK0S decays is presented, performed using data collected with the LHCb experiment in 2015 and 2016 at a 13TeV pp center-of-mass energy (Run 2). The CP asymmetry is measured to be ACP (D0 → K0SK0S) = (0.042±0.034±0.010), where the first uncertainty is statistical and the second is systematic. This result represents a significant improvement with respect to the previous LHCb Run 1 measurement.
Measurement of the time-integrated CP asymmetry in D0 → K0SK0S decays at LHCb
Tuci G.
2019-01-01
Abstract
The D0 → K0SK0S decay is a promising discovery channel for CP violation in charm. A prediction based on the Standard Model gives an upper limit for the CP asymmetry of about 1% and further enhancements could result from contributions from physics beyond the Standard Model. A preliminary measurement of the time-integrated CP asymmetry in prompt D0 → K0SK0S decays is presented, performed using data collected with the LHCb experiment in 2015 and 2016 at a 13TeV pp center-of-mass energy (Run 2). The CP asymmetry is measured to be ACP (D0 → K0SK0S) = (0.042±0.034±0.010), where the first uncertainty is statistical and the second is systematic. This result represents a significant improvement with respect to the previous LHCb Run 1 measurement.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
