We present new limits on resonant tb-bar production in p anti-p collisions at s**(1/2) = 1.96 TeV, using 1.9 fb-1 of data recorded with the CDF II detector at the Fermilab Tevatron. We reconstruct a putative tb-bar mass in events with a lepton, neutrino candidate, and two or three jets, and search for anomalous tb-bar production as modeled by W' --> tb-bar. We set a new limit on a right-handed W' with standard model-like coupling, excluding any mass below 800 GeV/c2 at 95% C.L. For any narrow W'-like state with mass above 800 GeV/c2, the cross-section is found to be less than 0.28 pb at 95% C.L. We also present an exclusion of the W' coupling strength versus W' mass.
A. Castro, M. Deninno, P. Mazzanti, N. Moggi, F. Rimondi, F. Semeria, et al. (2009). Search for the Production of Narrow tb-bar Resonances in 1.9 fb-1 of p anti-p Collisions at s**(1/2) =1.96 TeV. PHYSICAL REVIEW LETTERS, 103, 041801-1-041801-7 [10.1103/PhysRevLett.103.041801].
Search for the Production of Narrow tb-bar Resonances in 1.9 fb-1 of p anti-p Collisions at s**(1/2) =1.96 TeV
CASTRO, ANDREA;DENINNO, MARIA MADDALENA;MOGGI, NICCOLO';RIMONDI, FRANCO;ZUCCHELLI, STEFANO
2009
Abstract
We present new limits on resonant tb-bar production in p anti-p collisions at s**(1/2) = 1.96 TeV, using 1.9 fb-1 of data recorded with the CDF II detector at the Fermilab Tevatron. We reconstruct a putative tb-bar mass in events with a lepton, neutrino candidate, and two or three jets, and search for anomalous tb-bar production as modeled by W' --> tb-bar. We set a new limit on a right-handed W' with standard model-like coupling, excluding any mass below 800 GeV/c2 at 95% C.L. For any narrow W'-like state with mass above 800 GeV/c2, the cross-section is found to be less than 0.28 pb at 95% C.L. We also present an exclusion of the W' coupling strength versus W' mass.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
