Inguglia, G. (2012) The time-dependent CP violation in charm. Il nuovo cimento C, 35 (6). pp. 389-398. ISSN 1826-9885
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Abstract
A model which describes the time-dependent CP formalism in D0 decays has recently been proposed. There it has been highlighted a possible measurement of the angle βc, in the charm unitarity triangle, using the decays D0 → K+K− and D0 → π+π−, and a measurement of the mixing phase φMIX. The same method can be used to measure the value of the parameter x, one of the two parameters defining charm mixing. We numerically evaluate the impact of a time-dependent analysis in terms of the possible outcomes from present and future experiments. We consider the scenarios of correlated D0 mesons production at the center-of-mass energy of the Ψ(3770) at SuperB, uncorrelated production at the center-of-mass energy of the Υ(4S) at SuperB and Belle II, and LHCb. Recently a hint of direct CP violation in charm decays was reported by the LHCb Collaboration, we estimate the rate of time-dependent asymmetry that could be achieved using their available data, and we generalise the result for the full LHCb program. We conclude that LHCb is already able to perform a first measurement of βc,eff, and slightly improve the present constraints on the parameters x and φMIX. A more precise determination of βc,eff, φMIX and x will require a larger data sample, and most probably the cleaner environment of the new high-luminosities B-factories (both SuperB and Belle II) will be needed. We show that SuperB will be able to measure βc,eff and φMIX with a precision of 1.3◦ and improve the precision on x by a factor of two.
| Item Type: | Article |
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| Uncontrolled Keywords: | Decays of bottom mesons ; Determination of Cabibbo-Kobayashi & Maskawa (CKM) Matrix elements ; Charge conjugation, parity, time reversal, and other discrete symmetries |
| Subjects: | 500 Scienze naturali e Matematica > 530 Fisica |
| Depositing User: | Marina Spanti |
| Date Deposited: | 25 Apr 2020 15:27 |
| Last Modified: | 25 Apr 2020 15:27 |
| URI: | http://eprints.bice.rm.cnr.it/id/eprint/18022 |
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