Nanut, T. (2016) Studies of radiative charm decays at Belle. Il nuovo cimento C, 39 (4). pp. 1-8. ISSN 1826-9885
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Abstract
We report a measurement of the branching fractions of the radiative decays D0 → Vγ, whereV = φ, K∗0 or ρ0. This is the first observation of the decay D0 → ρ0γ. We measure preliminary branching fractions B`D0 → φγ´ = (2.76 ± 0.20 ± 0.08) × 10−5, B`D0 → K∗0γ´ = (4 .66 ± 0.21 ± 0.18) × 10−4 and B`D0 → ρ0γ´= (1 .77±0.30±0.08)×10−5, where the first uncertainty is statistical and the second systematic. We also present the first measurement of CP asymmetry in these decays. The preliminary values are ACP `D0 → φγ´ = −0.094±0.066± 0.001, ACP `D0 → K∗0γ´= −0.003±0.020±0.000 and ACP `D0 → ρ0γ´=0 .056±0 .151±0.006. We also present the results of the search for the rare charm decayD 0 → γγ, resulting in an upper limit on the branching fraction Br(D0 → γγ) <8 .5×10−7 at 90% confidence level, the most restrictive limit to date.
| Item Type: | Article |
|---|---|
| Subjects: | 500 Scienze naturali e Matematica > 530 Fisica |
| Depositing User: | Marina Spanti |
| Date Deposited: | 16 Nov 2020 20:15 |
| Last Modified: | 16 Nov 2020 20:15 |
| URI: | http://eprints.bice.rm.cnr.it/id/eprint/19611 |
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