Search for excited B+c states
| Parent link: | Journal of High Energy Physics Vol. 2018, iss. 1.— 2018.— [138, 18 p.] |
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| Institutionell upphovsman: | |
| Övriga upphovsmän: | , , , |
| Sammanfattning: | Title screen A search is performed in the invariant mass spectrum of the B+cπ+π− system for the excited B+c states B c (21S0)+ and B c (23S1)+ using a data sample of pp collisions collected by the LHCb experiment at the centre-of-mass energy of s√=8s=8 TeV, corresponding to an integrated luminosity of 2 fb−1. No evidence is seen for either state. Upper limits on the ratios of the production cross-sections of the B c (21S0)+ and B c (23S1)+ states times the branching fractions of B c (21S0)+ → B+cπ+π− and B c (23S1)+ → B*c+π+π− over the production cross-section of the B+c state are given as a function of their masses. They are found to be between 0.02 and 0.14 at 95% confidence level for B c (21S0)+ and B c (23S1)+ in the mass ranges [6830, 6890] MeV/c2 and [6795, 6890] MeV/c2, respectively. |
| Språk: | engelska |
| Publicerad: |
2018
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| Ämnen: | |
| Länkar: | https://doi.org/10.1007/JHEP01(2018)138 |
| Materialtyp: | Elektronisk Bokavsnitt |
| KOHA link: | https://koha.lib.tpu.ru/cgi-bin/koha/opac-detail.pl?biblionumber=664050 |
| Sammanfattning: | Title screen A search is performed in the invariant mass spectrum of the B+cπ+π− system for the excited B+c states B c (21S0)+ and B c (23S1)+ using a data sample of pp collisions collected by the LHCb experiment at the centre-of-mass energy of s√=8s=8 TeV, corresponding to an integrated luminosity of 2 fb−1. No evidence is seen for either state. Upper limits on the ratios of the production cross-sections of the B c (21S0)+ and B c (23S1)+ states times the branching fractions of B c (21S0)+ → B+cπ+π− and B c (23S1)+ → B*c+π+π− over the production cross-section of the B+c state are given as a function of their masses. They are found to be between 0.02 and 0.14 at 95% confidence level for B c (21S0)+ and B c (23S1)+ in the mass ranges [6830, 6890] MeV/c2 and [6795, 6890] MeV/c2, respectively. |
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| DOI: | 10.1007/JHEP01(2018)138 |