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Effects of isospin violation in the e + e − → B (*) B¯ (*) cross sections. / Bondar, A. E.; Milstein, A. I.; Mizuk, R. V. и др.
в: Journal of High Energy Physics, Том 2022, № 5, 170, 05.2022.Результаты исследований: Научные публикации в периодических изданиях › статья › Рецензирование
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TY - JOUR
T1 - Effects of isospin violation in the e + e − → B (*) B¯ (*) cross sections
AU - Bondar, A. E.
AU - Milstein, A. I.
AU - Mizuk, R. V.
AU - Salnikov, S. G.
N1 - Publisher Copyright: © 2022, The Author(s).
PY - 2022/5
Y1 - 2022/5
N2 - Model estimates are obtained for the influence of Coulomb effects on the ratio of the cross sections for the production of charged and neutral BB¯ and B*B¯ * pairs in e+e− annihilation. It is shown that the difference between the masses of charged and neutral mesons obtained under the assumption that this ratio is constant on a scale of the order of the beam energy spread can differ from the true one by δM ∼ 0.03 MeV at the energy of Υ(5S) and by δM ∼ 0.4 MeV at the energy of Υ(4S). Thus, the errors given in the PDG for the difference between the masses of charged and neutral B mesons, based on the results obtained at the energy of Υ(4S), are strongly underestimated. Similar measurements at the energy of Υ(5S) will have an order of magnitude smaller systematic shift for the mass difference. This circumstance should be taken into account when planning future experiments at the B factory in KEK.
AB - Model estimates are obtained for the influence of Coulomb effects on the ratio of the cross sections for the production of charged and neutral BB¯ and B*B¯ * pairs in e+e− annihilation. It is shown that the difference between the masses of charged and neutral mesons obtained under the assumption that this ratio is constant on a scale of the order of the beam energy spread can differ from the true one by δM ∼ 0.03 MeV at the energy of Υ(5S) and by δM ∼ 0.4 MeV at the energy of Υ(4S). Thus, the errors given in the PDG for the difference between the masses of charged and neutral B mesons, based on the results obtained at the energy of Υ(4S), are strongly underestimated. Similar measurements at the energy of Υ(5S) will have an order of magnitude smaller systematic shift for the mass difference. This circumstance should be taken into account when planning future experiments at the B factory in KEK.
KW - Bottom Quarks
KW - Quarkonium
UR - http://www.scopus.com/inward/record.url?scp=85130718032&partnerID=8YFLogxK
U2 - 10.1007/JHEP05(2022)170
DO - 10.1007/JHEP05(2022)170
M3 - Article
AN - SCOPUS:85130718032
VL - 2022
JO - Journal of High Energy Physics
JF - Journal of High Energy Physics
SN - 1029-8479
IS - 5
M1 - 170
ER -
ID: 36564602