Measurement of the Mass Difference Between Neutral Charm-Meson Eigenstates; Physical Review Letters; Vol. 122, iss. 23
| Parent link: | Physical Review Letters Vol. 122, iss. 23.— 2019.— [231802, 10 p.] |
|---|---|
| Enti autori: | , |
| Altri autori: | , , , , , , |
| Riassunto: | Title screen We report a measurement of the mass difference between neutral charm-meson eigenstates using a novel approach that enhances sensitivity to this parameter. We use 2.3×106 D0→K0Sπ+π− decays reconstructed in proton-proton collisions collected by the LHCb experiment in 2011 and 2012. Allowing for CP violation in mixing and in the interference between mixing and decay, we measure the CP-averaged normalized mass difference xCP=[2.7±1.6(stat)±0.4(syst)]×10−3 and the CP-violating parameter Δx=[−0.53±0.70(stat)±0.22(syst)]×10−3. The results are consistent with CP symmetry. These determinations are the most precise from a single experiment and, combined with current world-average results, yield the first evidence that the masses of the neutral charm-meson eigenstates differ. |
| Lingua: | inglese |
| Pubblicazione: |
2019
|
| Soggetti: | |
| Accesso online: | https://doi.org/10.1103/PhysRevLett.122.231802 |
| Natura: | Elettronico Capitolo di libro |
| KOHA link: | https://koha.lib.tpu.ru/cgi-bin/koha/opac-detail.pl?biblionumber=663349 |