The ATLAS detector at the Large Hadron Collider is used to search for excited electrons and excited muons in the channel pp!``!`` , assuming that excited leptons are produced via contact interactions. The analysis is based on 13 fb−1 of pp collisions at a centre-of-mass energy of 8 TeV. No evidence for excited leptons is found, and a limit is set at the 95% credibility level on the cross section times branching ratio as a function of the excitedlepton mass m` . For m` > 0.8 TeV, the respective upper limits on B(`!` ) are 0.75 and 0.90 fb for the e and μ searches. Limits on B are converted into lower bounds on the compositeness scale 3. In the special case where 3 = m` , excited-electron and excited-muon masses below 2.2 TeV are excluded.
Search for excited electrons and muons in √s=8 TeV proton–proton collisions with the ATLAS detector
CONTA, CLAUDIO;FRANCHINO, SILVIA;FRATERNALI, MARCO;LIVAN, MICHELE;NEGRI, ANDREA;REBUZZI, DANIELA MARCELLA;RIMOLDI, ADELE;
2013-01-01
Abstract
The ATLAS detector at the Large Hadron Collider is used to search for excited electrons and excited muons in the channel pp!``!`` , assuming that excited leptons are produced via contact interactions. The analysis is based on 13 fb−1 of pp collisions at a centre-of-mass energy of 8 TeV. No evidence for excited leptons is found, and a limit is set at the 95% credibility level on the cross section times branching ratio as a function of the excitedlepton mass m` . For m` > 0.8 TeV, the respective upper limits on B(`!` ) are 0.75 and 0.90 fb for the e and μ searches. Limits on B are converted into lower bounds on the compositeness scale 3. In the special case where 3 = m` , excited-electron and excited-muon masses below 2.2 TeV are excluded.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
