First measurement of the fraction of top-quark pair production through gluon-gluon fusion
/ Authors
G. Salamanna, O. Saltó, L. Santi, S. Sarkar, L. Sartori, K. Sato, A. Savoy-Navarro, T. Scheidle, P. Schlabach, E. Schmidt
and 59 more authors
M. Schmidt, M. Schmidt, M. Schmitt, T. Schwarz, L. Scodellaro, A. Scott, A. Scribano, F. Scuri, A. Sedov, S. Seidel, Y. Seiya, A. Semenov, L. Sexton-Kennedy, A. Sfyria, S. Shalhout, M. Shapiro, T. Shears, P. Shepard, D. Sherman, M. Shochet, Y. Shon, I. Shreyber, A. Sidoti, Nicolas Produit, A. Sisakyan, A. Slaughter, J. Slaunwhite, K. Sliwa, J. Smith, F. Snider, R. Snihur, M. Soderberg, A. Soha, S. Somalwar, P. Squillacioti, M. Stanitzki, R. Denis, B. Stelzer, O. Stelzer-Chilton, D. Stentz, J. Strologas, D. Stuart, J. Suh, A. Sukhanov, H. Sun, I. Suslov, T. Suzuki, A. Taffard, R. Takashima, Y. Takeuchi, M. Tecchio, K. Terashi, J. Thom, A. Thompson, G. Thompson, A. Varganov, E. Vataga, G. Velev, W. Wagner
/ Abstract
We present the first measurement of {sigma}(gG {yields} t{bar t})/{sigma}(p{bar p} {yields} t{bar t}). We use 0.96 fb{sup -1} of {radical}s = 1.96 TeV p{bar p} collision data recorded with the CDF II detector at Fermilab. We identify the candidate t{bar t} events with a high-energy charged lepton, a neutrino candidate, and four or more jets with at least one identified as originating from a b quark. Using charged particles with low transverse momentum in t{bar t} events, we find {sigma}(gg {yields} t{bar t})/{sigma}(p{bar p} {yields} t{bar t}) = 0.07 {+-} 0.14(stat) {+-} 0.07(syst), in agreement with the standard model NLO prediction of 0.15 {+-} 0.05.
Journal: Physical Review D