Manifestation of the electric dipole moment in the decays of τ leptons produced in e+e- annihilation

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Manifestation of the electric dipole moment in the decays of τ leptons produced in e+e- annihilation. / Obraztsov, I. V.; Milstein, A. I.

In: Physical Review D, Vol. 107, No. 9, 093001, 01.05.2023.

Research output: Contribution to journal › Article › peer-review

BibTeX

@article{225a9c09ed314399bc2f02009457d514,

title = "Manifestation of the electric dipole moment in the decays of τ leptons produced in e+e- annihilation",

abstract = "CP-odd asymmetries in the processes e+e-→τ+π-ντ, e+e-→π+τ-ν¯τ, e+e-→τ+ρ-ντ, e+e-→ρ+τ-ν¯τ, e+e-→τ+e-ντν¯e, and e+e-→τ-e+νeν¯τ are investigated with account for longitudinal polarization of electron (or positron) beam. These asymmetries are a manifestation of electric dipole form factor F3τb in the γτ+τ- vertex. It is shown that to measure Imb in the specified processes, polarization is not needed, while to measure Reb it is required. The processes e+e-→π+π-ντν¯τ, e+e-→e+e-ντν¯τνeν¯e, e+e-→μ+μ-ντν¯τνμν¯μ, e+e-→μ+e-ντν¯τνμν¯e, and e+e-→μ-e+ντν¯τνeν¯μ are also discussed for the case of unpolarized electron and positron beams. In the latter cases it is possible to measure Reb using the differential cross section over momenta of both registered particles.",

author = "Obraztsov, {I. V.} and Milstein, {A. I.}",

note = "We are grateful to D. A. Epifanov and V. S. Vorobiev for valuable discussions.",

year = "2023",

month = may,

day = "1",

doi = "10.1103/PhysRevD.107.093001",

language = "English",

volume = "107",

journal = "Physical Review D",

issn = "2470-0010",

publisher = "AMER PHYSICAL SOC",

number = "9",

}

RIS

TY - JOUR

T1 - Manifestation of the electric dipole moment in the decays of τ leptons produced in e+e- annihilation

AU - Obraztsov, I. V.

AU - Milstein, A. I.

N1 - We are grateful to D. A. Epifanov and V. S. Vorobiev for valuable discussions.

PY - 2023/5/1

Y1 - 2023/5/1

N2 - CP-odd asymmetries in the processes e+e-→τ+π-ντ, e+e-→π+τ-ν¯τ, e+e-→τ+ρ-ντ, e+e-→ρ+τ-ν¯τ, e+e-→τ+e-ντν¯e, and e+e-→τ-e+νeν¯τ are investigated with account for longitudinal polarization of electron (or positron) beam. These asymmetries are a manifestation of electric dipole form factor F3τb in the γτ+τ- vertex. It is shown that to measure Imb in the specified processes, polarization is not needed, while to measure Reb it is required. The processes e+e-→π+π-ντν¯τ, e+e-→e+e-ντν¯τνeν¯e, e+e-→μ+μ-ντν¯τνμν¯μ, e+e-→μ+e-ντν¯τνμν¯e, and e+e-→μ-e+ντν¯τνeν¯μ are also discussed for the case of unpolarized electron and positron beams. In the latter cases it is possible to measure Reb using the differential cross section over momenta of both registered particles.

AB - CP-odd asymmetries in the processes e+e-→τ+π-ντ, e+e-→π+τ-ν¯τ, e+e-→τ+ρ-ντ, e+e-→ρ+τ-ν¯τ, e+e-→τ+e-ντν¯e, and e+e-→τ-e+νeν¯τ are investigated with account for longitudinal polarization of electron (or positron) beam. These asymmetries are a manifestation of electric dipole form factor F3τb in the γτ+τ- vertex. It is shown that to measure Imb in the specified processes, polarization is not needed, while to measure Reb it is required. The processes e+e-→π+π-ντν¯τ, e+e-→e+e-ντν¯τνeν¯e, e+e-→μ+μ-ντν¯τνμν¯μ, e+e-→μ+e-ντν¯τνμν¯e, and e+e-→μ-e+ντν¯τνeν¯μ are also discussed for the case of unpolarized electron and positron beams. In the latter cases it is possible to measure Reb using the differential cross section over momenta of both registered particles.

UR - https://www.scopus.com/record/display.uri?eid=2-s2.0-85159672180&origin=inward&txGid=ca992ae343e2cfebce4cf2e45d3aeef2

UR - https://www.mendeley.com/catalogue/562d3324-7c20-30e8-88a6-61598a836f40/

U2 - 10.1103/PhysRevD.107.093001

DO - 10.1103/PhysRevD.107.093001

M3 - Article

VL - 107

JO - Physical Review D

JF - Physical Review D

SN - 2470-0010

IS - 9

M1 - 093001

ER -

ID: 59250434