Семинар «Физика адронов»

Дата и время: пятница, 17 марта 2023 г., в 11:00

Место: онлайн конференция в Zoom, аудитория им. Блохинцева (4-й этаж), Лаборатория теоретической физики им. Н. Н. Боголюбова

Ссылка для подключения к семинару в Zoom

Тема семинара: «Description of the decays τ → Kππν_τ in U(3) x U(3) NJL chiral quark model»

Докладчик: А. А. Пивоваров

Аннотация:

The branching fractions of the decays τ⁻ → K⁻π⁺π⁻ν_τ’ τ⁻ → K⁻π⁰π⁰ν_τ and τ⁻ → K⁰π⁻π⁰ν_τ are calculated in the Nambu—Jona-Lasinio U(3) × U(3) chiral model. Four intermediate channels are considered: the contact channel and the channels with the intermediate axial vector, vector and pseudoscalar mesons. The additional resonance states K^∗ and ρ are taken into account in all channels. It is shown that the main contributions to the widths of these decays are given by the axial vector channel. In the axial vector channel, the intermediate resonances K₁(1270) and K₁(1400) are taken into account. The obtained results are in satisfactory agreement with the known experimental data.