|
Title
|
|
|
|
Observation of τ Lepton Pair Production in Ultraperipheral Pb-Pb Collisions at =5.02 TeV
| |
|
Author
|
|
|
|
| |
|
Abstract
|
|
|
|
| We present an observation of photon-photon production of t lepton pairs in ultraperipheral lead-lead collisions. The measurement is based on a data sample with an integrated luminosity of 404 mu b(-1) collected by the CMS experiment at a center-of-mass energy per nucleon pair of root s(NN) = 5.02 TeV. The gamma gamma -> tau(+)tau(-) process is observed for tau(+)tau(-) events with a muon and three charged hadrons in the final state. The measured fiducial cross section is sigma(gamma gamma ->tau(+)tau(-)) = 4.8 +/- 0.6(stat) +/- 0.5(syst) mu b, where the second (third) term corresponds to the statistical (systematic) uncertainty in sigma(gamma gamma ->tau(+)tau(-)) in agreement with leading-order QED predictions. Using sigma(gamma gamma ->tau(+)tau(-)), we estimate a model-dependent value of the anomalous magnetic moment of the t lepton of at a(tau) = 0.001(-0.089)(+0.055). |
| |
|
Language
|
|
|
|
English
| |
|
Source (journal)
|
|
|
|
Physical review letters. - New York, N.Y., 1958, currens
| |
|
Publication
|
|
|
|
New York, N.Y.
:
American Physical Society
,
2023
| |
|
ISSN
|
|
|
|
0031-9007
[print]
1079-7114
[online]
| |
|
DOI
|
|
|
|
10.1103/PHYSREVLETT.131.151803
| |
|
Volume/pages
|
|
|
|
131
:15
(2023)
, p. 1-18
| |
|
Article Reference
|
|
|
|
151803
| |
|
ISI
|
|
|
|
001096935800001
| |
|
Pubmed ID
|
|
|
|
37897747
| |
|
Medium
|
|
|
|
E-only publicatie
| |
|
Full text (Publisher's DOI)
|
|
|
|
| |
|
Full text (open access)
|
|
|
|
| |
|