Observation of B0(s)→J/ψp¯p Decays and Precision Measurements of the B0(s) Masses
| Parent link: | Physical Review Letters Vol. 122, iss. 19.— 2019.— [191804, 10 p.] |
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| Corporate Authors: | , |
| Other Authors: | , , , , , |
| Summary: | Title screen The first observation of the decays B0(s)→J/ψp¯p is reported, using proton-proton collision data corresponding to an integrated luminosity of 5.2 fb−1, collected with the LHCb detector. These decays are suppressed due to limited available phase space, as well as due to Okubo-Zweig-Iizuka or Cabibbo suppression. The measured branching fractions are B(B0→J/ψp¯p)=[4.51±0.40(stat)±0.44(syst)]×10−7, B(B0s→J/ψp¯p)=[3.58±0.19(stat)±0.39(syst)]×10−6. For the B0s meson, the result is much higher than the expected value of O(10−9). The small available phase space in these decays also allows for the most precise single measurement of both the B0 mass as 5279.74±0.30(stat)±0.10(syst) MeV and the B0s mass as 5366.85±0.19(stat)±0.13(syst) MeV. |
| Language: | English |
| Published: |
2019
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| Subjects: | |
| Online Access: | http://earchive.tpu.ru/handle/11683/64803 https://doi.org/10.1103/PhysRevLett.122.191804 |
| Format: | Electronic Book Chapter |
| KOHA link: | https://koha.lib.tpu.ru/cgi-bin/koha/opac-detail.pl?biblionumber=663350 |