We performed a signature-based search for long-lived charged massive particles (CHAMPs) produced in 1.0 fb-1 of p anti-p collisions at sqrt s = 1.96 TeV, collected with the CDF II detector using a high transverse-momentum (p(t)) muon trigger. The search used time-of-flight to isolate slowly moving, high-p(t) particles. One event passed our selection cuts with an expected background of 1.9 +/- 0.2 events. We set an upper bound on the production cross section, and, interpreting this result within the context of a stable scalar top quark model, set a lower limit on the particle mass of 249 GeV/c2 at 95% C.L.
Search for Long-Lived Massive Charged Particles in 1.96 TeV p anti-p Collisions / A. Castro; M. Deninno; P. Mazzanti; N. Moggi; F. Rimondi; F. Semeria; S. Zucchelli. - In: PHYSICAL REVIEW LETTERS. - ISSN 0031-9007. - STAMPA. - 103:(2009), pp. 021802-1-021802-7. [10.1103/PhysRevLett.103.021802]
Search for Long-Lived Massive Charged Particles in 1.96 TeV p anti-p Collisions
CASTRO, ANDREA;DENINNO, MARIA MADDALENA;MOGGI, NICCOLO';RIMONDI, FRANCO;ZUCCHELLI, STEFANO
2009
Abstract
We performed a signature-based search for long-lived charged massive particles (CHAMPs) produced in 1.0 fb-1 of p anti-p collisions at sqrt s = 1.96 TeV, collected with the CDF II detector using a high transverse-momentum (p(t)) muon trigger. The search used time-of-flight to isolate slowly moving, high-p(t) particles. One event passed our selection cuts with an expected background of 1.9 +/- 0.2 events. We set an upper bound on the production cross section, and, interpreting this result within the context of a stable scalar top quark model, set a lower limit on the particle mass of 249 GeV/c2 at 95% C.L.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
