We report measurements of the e+ e− → B B̄, B B̄ ∗ , and B ∗ B̄ ∗ cross sections at four energies, 10653, 10701, 10746 and 10805 MeV, using data collected by the Belle II experiment. We reconstruct one B meson in a large number of hadronic final states and use its momentum to identify the production process. In the first 2 − 5 MeV above B ∗ B̄ ∗ threshold, the e+ e− → B ∗ B̄ ∗ cross section increases rapidly. This may indicate the presence of a pole close to the threshold.
Adachi, I., Aggarwal, L., Ahmed, H., Aihara, H., Akopov, N., Aloisio, A., et al. (2024). Measurement of the energy dependence of the e+e− → $$ B\overline{B} $$, $$ B{\overline{B}}^{\ast } $$, and $$ {B}^{\ast }{\overline{B}}^{\ast } $$ cross sections at Belle II. JOURNAL OF HIGH ENERGY PHYSICS, 2024(10), 1-31 [10.1007/jhep10(2024)114].
Measurement of the energy dependence of the e+e− → $$ B\overline{B} $$, $$ B{\overline{B}}^{\ast } $$, and $$ {B}^{\ast }{\overline{B}}^{\ast } $$ cross sections at Belle II
Branchini, P.Membro del Collaboration Group
;Budano, A.Membro del Collaboration Group
;Bussino, S.Membro del Collaboration Group
;De Pietro, G.Membro del Collaboration Group
;Laurenza, M.Membro del Collaboration Group
;Martellini, C.Membro del Collaboration Group
;Martini, A.Membro del Collaboration Group
;
2024-01-01
Abstract
We report measurements of the e+ e− → B B̄, B B̄ ∗ , and B ∗ B̄ ∗ cross sections at four energies, 10653, 10701, 10746 and 10805 MeV, using data collected by the Belle II experiment. We reconstruct one B meson in a large number of hadronic final states and use its momentum to identify the production process. In the first 2 − 5 MeV above B ∗ B̄ ∗ threshold, the e+ e− → B ∗ B̄ ∗ cross section increases rapidly. This may indicate the presence of a pole close to the threshold.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
