Exotic physics: search for excited and exotic electrons in the e gamma decay channel in p anti-p collisions at s**(1/2) = 1.96 tev

Acosta, D. ; CDF Collaboration

Lawrence Berkeley National Laboratory

关键词: Transverse Momentum;    43 Particle Accelerators;    Electrons;    Gamma Decay;    Sensitivity;   

DOI  :  10.2172/842915
RP-ID  :  LBNL--58095
RP-ID  :  AC03-76SF00098
RP-ID  :  842915

美国|英语

来源: UNT Digital Library

【 摘 要 】

We present a search for excited and exotic electrons (e*) decaying to an electron and a photon, both with high transverse momentum. We use 202 pb{sup -1} of data collected in p{bar p} collisions at {radical}s = 1.96 TeV with the CDF II detector. No signal above standard model expectation is seen for associated ee* production. We discuss the e* sensitivity in the parameter space of the excited electron mass M{sub e*} and the compositeness energy scale {Lambda}. In the contact interaction model, we exclude 132 GeV/c{sup 2} < M{sub e*} < 879 GeV/c{sup 2} for {Lambda} = M{sub e*} at 95% confidence level (C.L.). In the gauge-mediated model, we exclude 126 GeV/c{sup 2} < M{sub e*} < 430 GeV/c{sup 2} at 95% C.L. for the phenomenological coupling f/{Lambda} {approx} 10{sup -2} GeV{sup -1}.