τ dipole moments via radiative leptonic τ decays

Eidelman, S.; Epifanov, D.; Fael, Matteo; Mercolli, Lorenzo; Passera, Massimo (2016). τ dipole moments via radiative leptonic τ decays. Journal of High Energy Physics, 2016(3), p. 140. Springer 10.1007/JHEP03(2016)140

[img]
Preview
Text
JHEP03(2016)140.pdf - Published Version
Available under License Creative Commons: Attribution (CC-BY).

Download (552kB) | Preview

We propose a new method to probe the magnetic and electric dipole moments of the τ lepton using precise measurements of the differential rates of radiative leptonic τ decays at high-luminosity B factories. Possible deviations of these moments from the Standard Model values are analyzed in an effective Lagrangian approach, thus providing model-independent results. Analytic expressions for the relevant non-standard contributions to the differential decay rates are presented. Earlier proposals to probe the τ dipole moments are examined. A detailed feasibility study of our method is performed in the conditions of the Belle and Belle II experiments at the KEKB and Super-KEKB colliders, respectively. This study shows that our approach, applied to the planned full set of Belle II data for radiative leptonic τ decays, has the potential to improve the present experimental bound on the τ anomalous magnetic moment. On the contrary, its foreseen sensitivity is not expected to lower the current experimental limit on the τ electric dipole moment.

Item Type:

Journal Article (Original Article)

Division/Institute:

10 Strategic Research Centers > Albert Einstein Center for Fundamental Physics (AEC)
08 Faculty of Science > Institute of Theoretical Physics

UniBE Contributor:

Fael, Matteo; Mercolli, Lorenzo and Passera, Massimo

Subjects:

500 Science > 530 Physics

ISSN:

1029-8479

Publisher:

Springer

Language:

English

Submitter:

Esther Fiechter

Date Deposited:

31 Aug 2016 14:49

Last Modified:

31 Aug 2016 14:49

Publisher DOI:

10.1007/JHEP03(2016)140

ArXiv ID:

1601.07987

BORIS DOI:

10.7892/boris.86295

URI:

https://boris.unibe.ch/id/eprint/86295

Actions (login required)

Edit item Edit item
Provide Feedback