Decays \(\tau \rightarrow f_0(\pi ,K) \nu _\tau \) and \(\tau \rightarrow 3 \pi \nu _\tau \) accounting for the contribution of \(f_0(500)\)

IF 2.6 3区 物理与天体物理 Q2 PHYSICS, NUCLEAR
M. K. Volkov, A. A. Pivovarov, K. Nurlan
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引用次数: 0

Abstract

In the \(U(3) \times U(3)\) quark NJL model, \(\tau \) lepton decays with the production of scalar mesons \(f_0(\pi ,K)\) and neutrinos are studied, where \(f_0=f_0(500), f_0(980)\). It is shown that these decays mainly occur via contact channels and channels with axial-vector mesons \(a_1(1260)\), \(K_1(1270)\) and \(K_1(1400)\). All mesons are considered as quark-antiquark states in this case. The obtained results can be considered as predictions for future experiments. The obtained estimates for the branching fractions of the \(\tau \rightarrow \pi ^-2\pi ^0 \nu _\tau \) decay taking into account the contributions of the \(\rho \pi \) and \(f_0(500)\pi \) states are in satisfactory agreement with experimental data.

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来源期刊
The European Physical Journal A
The European Physical Journal A 物理-物理:核物理
CiteScore
5.00
自引率
18.50%
发文量
216
审稿时长
3-8 weeks
期刊介绍: Hadron Physics Hadron Structure Hadron Spectroscopy Hadronic and Electroweak Interactions of Hadrons Nonperturbative Approaches to QCD Phenomenological Approaches to Hadron Physics Nuclear and Quark Matter Heavy-Ion Collisions Phase Diagram of the Strong Interaction Hard Probes Quark-Gluon Plasma and Hadronic Matter Relativistic Transport and Hydrodynamics Compact Stars Nuclear Physics Nuclear Structure and Reactions Few-Body Systems Radioactive Beams Electroweak Interactions Nuclear Astrophysics Article Categories Letters (Open Access) Regular Articles New Tools and Techniques Reviews.
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