Test of lepton universality with B0 - K*0е+е - decays; Journal of High Energy Physics; Vol. 2017
| Parent link: | Journal of High Energy Physics Vol. 2017.— 2017.— [128, 18 p.] |
|---|---|
| Autor Corporativo: | |
| Outros Autores: | , , , , |
| Resumo: | Title screen A test of lepton universality, performed by measuring the ratio of the branching fractions of the B0 - K*0[mu]+[mu] - and B0 - K*0e+e- decays, RK*0RK*0, is presented. The K*0 meson is reconstructed in the final state K+[pi]-, which is required to have an invariant mass within 100 MeV/c2 of the known K*(892)0 mass. The analysis is performed using proton-proton collision data, corresponding to an integrated luminosity of about 3 fb-1, collected by the LHCb experiment at centre-of-mass energies of 7 and 8 TeV. The ratio is measured in two regions of the dilepton invariant mass squared, q2, to be RK*0={0.66+−0.11/0.07(stat)+-0.03(syst) for 0.045<q2<1.1GeV2/c4, 0.69+−0.11/0.07(stat)+-0.05(syst) for 1.1<q2<6.0GeV2/c4. The corresponding 95.4% confidence level intervals are [0.52, 0.89] and [0.53, 0.94]. The results, which represent the most precise measurements of RK*0RK*0 to date, are compatible with the Standard Model expectations at the level of 2.1-2.3 and 2.4-2.5 standard deviations in the two q2 regions, respectively. |
| Idioma: | inglês |
| Publicado em: |
2017
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| Assuntos: | |
| Acesso em linha: | https://doi.org/10.1007/JHEP08(2017)055 |
| Formato: | Recurso Electrónico Capítulo de Livro |
| KOHA link: | https://koha.lib.tpu.ru/cgi-bin/koha/opac-detail.pl?biblionumber=656580 |
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| 200 | 1 | |a Test of lepton universality with B0 - K*0е+е - decays |f R. Aaij [et al.] | |
| 203 | |a Text |c electronic | ||
| 300 | |a Title screen | ||
| 320 | |a [References: 35 tit.] | ||
| 330 | |a A test of lepton universality, performed by measuring the ratio of the branching fractions of the B0 - K*0[mu]+[mu] - and B0 - K*0e+e- decays, RK*0RK*0, is presented. The K*0 meson is reconstructed in the final state K+[pi]-, which is required to have an invariant mass within 100 MeV/c2 of the known K*(892)0 mass. The analysis is performed using proton-proton collision data, corresponding to an integrated luminosity of about 3 fb-1, collected by the LHCb experiment at centre-of-mass energies of 7 and 8 TeV. The ratio is measured in two regions of the dilepton invariant mass squared, q2, to be RK*0={0.66+−0.11/0.07(stat)+-0.03(syst) for 0.045<q2<1.1GeV2/c4, 0.69+−0.11/0.07(stat)+-0.05(syst) for 1.1<q2<6.0GeV2/c4. The corresponding 95.4% confidence level intervals are [0.52, 0.89] and [0.53, 0.94]. The results, which represent the most precise measurements of RK*0RK*0 to date, are compatible with the Standard Model expectations at the level of 2.1-2.3 and 2.4-2.5 standard deviations in the two q2 regions, respectively. | ||
| 461 | |t Journal of High Energy Physics | ||
| 463 | |t Vol. 2017 |v [128, 18 p.] |d 2017 | ||
| 610 | 1 | |a электронный ресурс | |
| 610 | 1 | |a труды учёных ТПУ | |
| 610 | 1 | |a B physics | |
| 610 | 1 | |a branching fraction | |
| 610 | 1 | |a Hadron-Hadron scattering (experiments) | |
| 610 | 1 | |a rare decay | |
| 610 | 1 | |a физика | |
| 610 | 1 | |a распад | |
| 610 | 1 | |a лептонные распады | |
| 610 | 1 | |a лептонные процессы | |
| 610 | 1 | |a ветвящиеся фракции | |
| 701 | 1 | |a Aaij |b R. |g Roel | |
| 701 | 1 | |a Adeva |b B. |g Bernardo | |
| 701 | 1 | |a Adinolfi |b M. | |
| 701 | 1 | |a Ajaltouni |b Z. J. |g Zeina | |
| 701 | 1 | |a Vagner |b A. R. |c physicist |c Vice-rector for educational activities of Tomsk Polytechnic University, candidate of physical and mathematical sciences |f 1983- |g Aleksandr Rudolfovich |3 (RuTPU)RU\TPU\pers\31560 | |
| 712 | 0 | 2 | |a Национальный исследовательский Томский политехнический университет (ТПУ) |b Физико-технический институт (ФТИ) |b Кафедра прикладной физики (№ 12) (ПФ) |3 (RuTPU)RU\TPU\col\18729 |
| 801 | 2 | |a RU |b 63413507 |c 20171120 |g RCR | |
| 856 | 4 | |u https://doi.org/10.1007/JHEP08(2017)055 | |
| 942 | |c CF | ||