Cargando…
Anomalous electromagnetic moments of $\tau$ lepton in $\gamma \gamma \to \tau^+ \tau^-$ reaction in Pb+Pb collisions at the LHC
We discuss the sensitivity of the γγ→τ+τ− process in ultraperipheral Pb+Pb collisions on the anomalous magnetic ( aτ ) and electric ( dτ ) moments of τ lepton at LHC energies. We derive the corresponding cross sections by folding the elementary cross section with the heavy-ion photon fluxes and cons...
| Autores principales: | , , , |
|---|---|
| Lenguaje: | eng |
| Publicado: |
2020
|
| Materias: | |
| Acceso en línea: | https://dx.doi.org/10.1016/j.physletb.2020.135682 http://cds.cern.ch/record/2712223 |
| _version_ | 1780965271885840384 |
|---|---|
| author | Dyndal, Mateusz Klusek-Gawenda, Mariola Schott, Matthias Szczurek, Antoni |
| author_facet | Dyndal, Mateusz Klusek-Gawenda, Mariola Schott, Matthias Szczurek, Antoni |
| author_sort | Dyndal, Mateusz |
| collection | CERN |
| description | We discuss the sensitivity of the γγ→τ+τ− process in ultraperipheral Pb+Pb collisions on the anomalous magnetic ( aτ ) and electric ( dτ ) moments of τ lepton at LHC energies. We derive the corresponding cross sections by folding the elementary cross section with the heavy-ion photon fluxes and considering semi-leptonic decays of both τ leptons in the fiducial volume of ATLAS and CMS detectors. We present predictions for total and differential cross sections, and for the ratios to γγ→e+e−(μ+μ− ) process. These ratios allow to cancel theoretical and experimental uncertainties when performing precision measurements at the LHC. The expected limits on aτ with existing Pb+Pb dataset are found to be better by a factor of two comparing to current best experimental limits and can be further improved by another factor of two at High Luminosity LHC. |
| id | cern-2712223 |
| institution | Organización Europea para la Investigación Nuclear |
| language | eng |
| publishDate | 2020 |
| record_format | invenio |
| spelling | cern-27122232021-08-06T02:07:48Zdoi:10.1016/j.physletb.2020.135682http://cds.cern.ch/record/2712223engDyndal, MateuszKlusek-Gawenda, MariolaSchott, MatthiasSzczurek, AntoniAnomalous electromagnetic moments of $\tau$ lepton in $\gamma \gamma \to \tau^+ \tau^-$ reaction in Pb+Pb collisions at the LHChep-phParticle Physics - PhenomenologyWe discuss the sensitivity of the γγ→τ+τ− process in ultraperipheral Pb+Pb collisions on the anomalous magnetic ( aτ ) and electric ( dτ ) moments of τ lepton at LHC energies. We derive the corresponding cross sections by folding the elementary cross section with the heavy-ion photon fluxes and considering semi-leptonic decays of both τ leptons in the fiducial volume of ATLAS and CMS detectors. We present predictions for total and differential cross sections, and for the ratios to γγ→e+e−(μ+μ− ) process. These ratios allow to cancel theoretical and experimental uncertainties when performing precision measurements at the LHC. The expected limits on aτ with existing Pb+Pb dataset are found to be better by a factor of two comparing to current best experimental limits and can be further improved by another factor of two at High Luminosity LHC.We discuss the sensitivity of the $\gamma \gamma \to \tau^+ \tau^-$ process in ultraperipheral Pb+Pb collisions on the anomalous magnetic ($a_{\tau}$) and electric ($d_{\tau}$) moments of $\tau$ lepton at LHC energies. We derive the corresponding cross sections by folding the elementary cross section with the heavy-ion photon fluxes and considering semi-leptonic decays of both $\tau$ leptons in the fiducial volume of ATLAS and CMS detectors. We present predictions for total and differential cross sections, and for the ratios to $\gamma \gamma \to e^+ e^- (\mu^+ \mu^-$) process. These ratios allow to cancel theoretical and experimental uncertainties when performing precision measurement of $a_{\tau}$ at the LHC. The expected limits on $a_{\tau}$ with existing Pb+Pb dataset are found to be better by a factor of two comparing to current best experimental limits and can be further improved by another factor of two at High Luminosity LHC.arXiv:2002.05503oai:cds.cern.ch:27122232020-02-13 |
| spellingShingle | hep-ph Particle Physics - Phenomenology Dyndal, Mateusz Klusek-Gawenda, Mariola Schott, Matthias Szczurek, Antoni Anomalous electromagnetic moments of $\tau$ lepton in $\gamma \gamma \to \tau^+ \tau^-$ reaction in Pb+Pb collisions at the LHC |
| title | Anomalous electromagnetic moments of $\tau$ lepton in $\gamma \gamma \to \tau^+ \tau^-$ reaction in Pb+Pb collisions at the LHC |
| title_full | Anomalous electromagnetic moments of $\tau$ lepton in $\gamma \gamma \to \tau^+ \tau^-$ reaction in Pb+Pb collisions at the LHC |
| title_fullStr | Anomalous electromagnetic moments of $\tau$ lepton in $\gamma \gamma \to \tau^+ \tau^-$ reaction in Pb+Pb collisions at the LHC |
| title_full_unstemmed | Anomalous electromagnetic moments of $\tau$ lepton in $\gamma \gamma \to \tau^+ \tau^-$ reaction in Pb+Pb collisions at the LHC |
| title_short | Anomalous electromagnetic moments of $\tau$ lepton in $\gamma \gamma \to \tau^+ \tau^-$ reaction in Pb+Pb collisions at the LHC |
| title_sort | anomalous electromagnetic moments of $\tau$ lepton in $\gamma \gamma \to \tau^+ \tau^-$ reaction in pb+pb collisions at the lhc |
| topic | hep-ph Particle Physics - Phenomenology |
| url | https://dx.doi.org/10.1016/j.physletb.2020.135682 http://cds.cern.ch/record/2712223 |
| work_keys_str_mv | AT dyndalmateusz anomalouselectromagneticmomentsoftauleptoningammagammatotautaureactioninpbpbcollisionsatthelhc AT klusekgawendamariola anomalouselectromagneticmomentsoftauleptoningammagammatotautaureactioninpbpbcollisionsatthelhc AT schottmatthias anomalouselectromagneticmomentsoftauleptoningammagammatotautaureactioninpbpbcollisionsatthelhc AT szczurekantoni anomalouselectromagneticmomentsoftauleptoningammagammatotautaureactioninpbpbcollisionsatthelhc |