Measurement of the p(p)over-bar -> W plus b plus X production cross section at root s=1.96 TeV D0 Collaboration

• Published in: Physics letters. B 2013, Vol.718 (4-5), p.1314
• Main Authors: Badaud, F., Barberis, E., Bazterra, V., Bean, A., Bertram, I., Besançon, M., Bhat, P. C., Bhatia, S., Bloom, K., Boehnlein, A., Boline, D., Brandt, A., Brandt, O., Caughron, S., Chapon, E., Chen, G., Choi, S., Choudhary, B., Cihangir, S., Clutter, J., Cooke, M., Corcoran, M., Cutts, D., Denisov, D., Denisov, S. P., Diesburg, M., Dyshkant, A., Ellison, J., Enari, Y., Evdokimov, V. N., Facini, G., Fox, H., Gay, P., Gerber, C. E., Grannis, P. D., Greder, S., Greenlee, H., Grünewald, M. W., Hegab, H., Heredia-De La Cruz, I., Hohlfeld, M., Howley, I., Iashvili, I., Ito, A. S., Jaffré, M., Johns, K., Jonckheere, A., Joshi, J., Karmanov, D., Kehoe, R., Kermiche, S., Khalatyan, N., Kiselevich, I., Lammers, S., Lellouch, J., Li, D., Linnemann, J., McGivern, C. L., Menezes, D., Merkin, M., Mondal, N. K., Naimuddin, M., Neal, H. A., Neustroev, P., Nunnemann, T., Osman, N., Osta, J., Pal, A., Parihar, V., Perfilov, M., Petrillo, G., Pétroff, P., Podstavkov, V. M., Prewitt, M., Prokopenko, N., Ranjan, K., Razumov, I., Ruchti, R., Santos, A. S., Sawyer, L., Schamberger, R. D., Schellman, H., Schwienhorst, R., Sekaric, J., Snow, J., Snyder, S., Sonnenschein, L., Soustruznik, K., Suter, L., Titov, M., Tschann-Grimm, K., Tully, C., Varelas, N., Vesterinen, M., Wahl, H. D., Warchol, J., Wilson, G. W., Yu, J. M., Zennamo, J., Zhu, J.
• Format: Article
• Language: English
• ISSN: 1873-2445; 0370-2693
• DOI: 10.1016/j.physletb.2012.12.044

We present a measurement of the cross section for W boson production in association with at least one b-quark jet in proton-antiproton collisions. The measurement is made using data corresponding to an integrated luminosity of 6.1fb-1 recorded with the D0 detector at the Fermilab Tevatron pp̄ Collider at s=1.96TeV. We measure an inclusive cross section of σ(W(→μν)+b+X)=1.04±0.05(stat.)±0.12(syst.) pb and σ(W(→eν)+b+X)=1.00±0.04(stat.)±0.12(syst.) pb in the phase space defined by pTν>25GeV, pTb-jet>20 GeV, |ηb-jet|<1.1, and a muon (electron) with pTℓ>20 GeV and |ημ|<1.7 (|ηe|<1.1 or 1.5<|ηe|<2.5). The combined result per lepton family is σ(W(→ℓν)+b+X)=1.05±0.12(stat.+syst.) pb for |ηℓ|<1.7. The results are in agreement with predictions from next-to-leading order QCD calculations using mcfm, σ(W+b){dot operator}B(W→ℓν)=1.34-0.34+0.41(syst.) pb, and also with predictions from the sherpa and madgraph Monte Carlo event generators.