Электронный каталог

Статья

Tumasyan, A.
Observation of *t Lepton Pair Production in Ultraperipheral Pb-Pb Collisions at *%s&sub(NN) = 5.02  TeV / A.Tumasyan, S.Afanasiev, D.Budkouski, I.Golutvin, I.Gorbunov, V.Karjavine, V.Korenkov, A.Lanev, A.Malakhov, V.Matveev, V.Palichik, V.Perelygin, M.Savina, V.Shalaev, S.Shmatov, S.Shulha, V.Smirnov, O.Teryaev, N.Voytishin, B.S.Yuldashev, A.Zarubin, I.Zhizhin, N.Krasnikov, M.Finger, M.Finger Jr., Z.Tsamalaidze, [CMS Collab.] // Physical Review Letters [Electronic resource]. – 2023. – Vol.131, No.15. – P. 151803. – URL: https://doi.org/10.1103/PhysRevLett.131.151803. – Bibliogr.: 38.

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  *m⁢b*−*1 collected by the CMS experiment at a center-of-mass energy per nucleon pair of *%s&sub(NN) = 5.02  TeV. The *g*g *> *t*+*t*- process is observed for *t*+*t*- events with a muon and three charged hadrons in the final state. The measured fiducial cross section is *s⁡(*g*g *> *t*+*t*-) = 4.8 *( 0.6⁢(stat) *( 0.5⁢(syst)  *mb, where the second (third) term corresponds to the statistical (systematic) uncertainty in *s⁡(*g*g *> *t*+*t*-) in agreement with leading-order QED predictions. Using *s⁡(*g*g *> *t*+*t*-), we estimate a model-dependent value of the anomalous magnetic moment of the *t lepton of a&sub(*t) = 0.00⁢1&sup(+0.055)&sub(−0.089).



Спец.(статьи,препринты) = С 343 е2 - Взаимодействие релятивистских ядер с ядрами
ОИЯИ = ОИЯИ (JINR)2023