Possibility of determining τ lepton electromagnetic moments in γγ → τ+ τ− process at the CERN-LHC

Atağ, S.; Billur, A. A.

doi:10.1007/jhep11(2010)060

Cited by 59 publications

(37 citation statements)

References 55 publications

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“…The anomalous magnetic and electric dipole moments of the τ-lepton via the process pp → ppτ þ τ − with 2% of the total systematic uncertainties at the LHC were investigated phenomenologically in Ref. [72]. Work in this regard is done by ATLAS and CMS Collaborations [73,74].…”

Section: Fig 2 the Feynman Diagrams For The Process γγmentioning

confidence: 99%

Model-independent sensitivity estimates for the electromagnetic dipole moments of the τ -lepton at the CLIC

et al. 2018

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We establish model-independent sensitivity on the anomalous magnetic and electric dipole moments of the τ-lepton using the two-photon processes γγ → τ þ τ − and γγ → τ þ τ − γ. We use L ¼ 10, 50, 100, 300, 500, 1000, 1500, 2000, 3000 fb −1 data collected with the future e þ e − linear collider such as the CLIC at ffiffi ffi s p ¼ 380, 1500, 3000 GeV, and we consider systematic uncertainties of δ sys ¼ 0%, 3%, 5%. We obtain sensitivity estimates at 95% C.L. on the anomalous dipole moments to the τ-lepton −0.00015 ≤ã τ ≤ 0.00017 and jd τ ðecmÞj ¼ 9.040 × 10 −19 that may be achievable in future experiments. Our results show that the processes under consideration are very promising for probing the dipole moments of the τ-lepton at the future e þ e − linear collider at the γγ mode.

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Section: Fig 2 the Feynman Diagrams For The Process γγmentioning

confidence: 99%

Model-independent sensitivity estimates for the electromagnetic dipole moments of the τ -lepton at the CLIC

et al. 2018

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“…As explained above, this process is related through gauge invariance to the more traditional probes of the τ 's electroweak interactions via precision measurements of its production and/or decay [8][9][10][11][12][13][14][15][16][17][18][19][20][21][22][23], and we will see that Higgs decays provide both an opportunity to discover physics beyond the Standard model, or to provide some of the best constraints on an anomalous contribution to the τ magnetic moment. This work is structured as follows.…”

Section: Jhep12(2016)111mentioning

confidence: 99%

H →τ + τ − γ as a probe of the τ magnetic dipole moment

Galon

Rajaraman

Tait

2016

J. High Energ. Phys.

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“…At the LHC, bounds on the τ dipole moments are expected to be set in τ pair production via Drell-Yan [30,31] or double photon scattering processes [32]. The best limits achievable in pp → τ + τ − + X are estimated to be comparable with present existing ones if one assumes that the total cross section for τ pair production will be measured at the 14% level.…”

Section: Experimental Determinationmentioning

confidence: 99%

Radiativeτleptonic decays and the possibility to determine theτdipole moments

Fael

2016

EPJ Web of Conferences

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Abstract. Precise data on radiative leptonic τ decays offer the opportunity to probe the electromagnetic properties of the τ and may allow to determine its anomalous magnetic moment which, in spite of its precise Standard Model prediction, has never been measured. Recently, the branching fractions of the radiative leptonic τ decays (τ → lννγ, with l = e, μ) were measured by the Babar collaboration. These precise measurements, with a relative error of about 3%, must be compared with the branching ratios at the next-to-leading order in QED. Indeed the radiative corrections are expected to be of order 10%, for l = e, and 3%, for l = μ. Here, we present the prediction of the differential decay rates and branching ratios of the radiative leptonic τ decays in the Standard Model at the next-to-leading order and we compare them with the recent Babar measurements. Moreover, we report on a dedicated feasibility study for the measurements of the τ anomalous magnetic moment at Belle and Belle II.

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Possibility of determining τ lepton electromagnetic moments in γγ → τ+ τ− process at the CERN-LHC

Abstract: Potential of the LHC to determine the electromagnetic couplings of the τ lepton is discussed via the process γγ → τ + τ − . Highly improved constraints of the anomalous magnetic and electric dipole moments have been obtained compared to the LEP sensitivity.

Cited by 59 publications

References 55 publications

Model-independent sensitivity estimates for the electromagnetic dipole moments of the τ -lepton at the CLIC

Model-independent sensitivity estimates for the electromagnetic dipole moments of the τ -lepton at the CLIC

H →τ + τ − γ as a probe of the τ magnetic dipole moment

Radiativeτleptonic decays and the possibility to determine theτdipole moments

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