A study of events containing two tau leptons with high transverse momentum has been performed with the ZEUS detector at HERA, using a data sample corresponding to an integrated luminosity of 0.33 fb(-1). The tau candidates were identified from their decays into electrons, muons or hadronic jets. The number of tau-pair candidates has been compared with the prediction from the Standard Model, where the largest contribution is expected from Bethe-Heitler processes. The total visible cross section was extracted. Standard Model expectations agree well with the measured distributions, also at high invariant mass of the tau pair. RI Gladilin, Leonid/B-5226-2011; Katkov, Igor/E-2627-2012; Fazio, Salvatore /G-5156-2010
Study of tau-pair production at HERA
CAPUA, Marcella;Fazio S;MASTROBERARDINO, Anna;Schioppa M;Susinno G;TASSI, Enrico;
2011-01-01
Abstract
A study of events containing two tau leptons with high transverse momentum has been performed with the ZEUS detector at HERA, using a data sample corresponding to an integrated luminosity of 0.33 fb(-1). The tau candidates were identified from their decays into electrons, muons or hadronic jets. The number of tau-pair candidates has been compared with the prediction from the Standard Model, where the largest contribution is expected from Bethe-Heitler processes. The total visible cross section was extracted. Standard Model expectations agree well with the measured distributions, also at high invariant mass of the tau pair. RI Gladilin, Leonid/B-5226-2011; Katkov, Igor/E-2627-2012; Fazio, Salvatore /G-5156-2010I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
