Measurement of the differential γ + 2 b -jet cross section and the ratio σ ( γ + 2 b -jets ) / σ ( γ + b -jet ) in p p ¯ collisions at s = 1.96 TeV

We present the first measurements of the differential cross section dσ/dpγΤ for the production of an isolated photon in association with at least two b-quark jets. The measurements consider photons with rapidities |yγ | < 1.0 and transverse momenta 30 < pγΤ < 200 GeV. The b-quark jets are r...

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Veröffentlicht in:	Physics letters. B 2014-10, Vol.737 (C), p.357-365
Hauptverfasser:	Abazov, V.M., Abbott, B., Acharya, B.S., Adams, M., Adams, T., Agnew, J.P., Alexeev, G.D., Alkhazov, G., Alton, A., Askew, A., Atkins, S., Augsten, K., Avila, C., Badaud, F., Bagby, L., Baldin, B., Bandurin, D.V., Banerjee, S., Barberis, E., Baringer, P., Bartlett, J.F., Bassler, U., Bazterra, V., Bean, A., Begalli, M., Bellantoni, L., Beri, S.B., Bernardi, G., Bernhard, R., Bertram, I., Besançon, M., Beuselinck, R., Bhat, P.C., Bhatia, S., Bhatnagar, V., Blazey, G., Blessing, S., Bloom, K., Boehnlein, A., Boline, D., Boos, E.E., Borissov, G., Borysova, M., Brandt, A., Brandt, O., Brock, R., Bross, A., Brown, D., Bu, X.B., Buehler, M., Buescher, V., Bunichev, V., Burdin, S., Buszello, C.P., Camacho-Pérez, E., Casey, B.C.K., Castilla-Valdez, H., Caughron, S., Chakrabarti, S., Chan, K.M., Chandra, A., Chapon, E., Chen, G., Cho, S.W., Choi, S., Choudhary, B., Cihangir, S., Claes, D., Clutter, J., Cooke, M., Cooper, W.E., Corcoran, M., Couderc, F., Cousinou, M.-C., Cutts, D., Das, A., Davies, G., de Jong, S.J., De La Cruz-Burelo, E., Déliot, F., Demina, R., Denisov, D., Denisov, S.P., Desai, S., Deterre, C., DeVaughan, K., Diehl, H.T., Diesburg, M., Ding, P.F., Dominguez, A., Dubey, A., Dudko, L.V., Duperrin, A., Dutt, S., Eads, M., Edmunds, D., Ellison, J., Elvira, V.D., Enari, Y., Evans, H.
Format:	Artikel
Sprache:	eng
Schlagworte:	PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
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Zusammenfassung:	We present the first measurements of the differential cross section dσ/dpγΤ for the production of an isolated photon in association with at least two b-quark jets. The measurements consider photons with rapidities \|yγ \| < 1.0 and transverse momenta 30 < pγΤ < 200 GeV. The b-quark jets are required to have pjetΤ > 15 GeVand \|γjet\| < 1.5. The ratio of differential production cross sections for γ + 2 b-jets to γ +b-jet as a function of pγΤ is also presented. The results are based on the proton–antiproton collision data at √s = 1.96 TeV collected with the D0 detector at the Fermilab Tevatron Collider. As a result, the measured cross sections and their ratios are compared to the next-to-leading order perturbative QCD calculations as well as predictions based on the kΤ-factorization approach and those from the sherpa and pythia Monte Carlo event generators.
ISSN:	0370-2693 1873-2445
DOI:	10.1016/j.physletb.2014.09.007