The dilepton mass spectrum in p (p) over bar --> l(+)l(-) + X interactions is studied using dielectrons (ee) and dimuons (mu mu) in 110 pb(-1) of data collected with the Collider Detector at Fermilab. The data are consistent with standard model predictions. The mass spectrum, being a probe for new physics, is examined for new interactions of quarks and leptons from a common composite structure. Assuming a contact interaction with the conventional coupling g(0)(2)/4 pi = 1 limits on chiral quark-electron and quark-muon compositeness scales in the range of 2.5 to 4.2 TeV are obtained. RI Lancaster, Mark/C-1693-2008; Vucinic, Dejan/C-2406-2008; Peters, Michael/B-4973-2009; Chiarelli, Giorgio/E-8953-2012; Azzi, Patrizia/H-5404-2012
Limits on quark-lepton compositeness scales from dileptons produced in 1.8 TeV p(p)over-bar collisions
PIACENTINO, Giovanni Maria;
1997-01-01
Abstract
The dilepton mass spectrum in p (p) over bar --> l(+)l(-) + X interactions is studied using dielectrons (ee) and dimuons (mu mu) in 110 pb(-1) of data collected with the Collider Detector at Fermilab. The data are consistent with standard model predictions. The mass spectrum, being a probe for new physics, is examined for new interactions of quarks and leptons from a common composite structure. Assuming a contact interaction with the conventional coupling g(0)(2)/4 pi = 1 limits on chiral quark-electron and quark-muon compositeness scales in the range of 2.5 to 4.2 TeV are obtained. RI Lancaster, Mark/C-1693-2008; Vucinic, Dejan/C-2406-2008; Peters, Michael/B-4973-2009; Chiarelli, Giorgio/E-8953-2012; Azzi, Patrizia/H-5404-2012I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.