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Measurement of the tt¯ production cross section with an in situ calibration of b-jet identification efficiency

Abstract: A measurement of the top-quark pair-production cross section in p¯p collisions at ?s=1.96?TeV using data corresponding to an integrated luminosity of 1.12??fb?1 collected with the Collider Detector at Fermilab is presented. Decays of top-quark pairs into the final states e?+ jets and ??+ jets are selected, and the cross section and the b-jet identification efficiency are determined using a new measurement technique which requires agreement between the measured cross sections with exactly one and with multiple identified b quarks from the top-quark decays. Assuming a top-quark mass of 175GeV/c2, a cross section of 8.5±0.6(stat)±0.7(syst)pb is measured.

Authorship: Aaltonen T., Álvarez González B., Amerio S., Amidei D., Anastassov A., Annovi A., Antos J., Apollinari G., Appel J.A., Apresyan A., Arisawa T., Artikov A., Asaadi J., Ashmanskas W., Auerbach B., Aurisano A., Azfar F., Badgett W., Barbaro-Galtieri A., Barnes V.E., Barnett B.A., Barria P., Bartos P., Bauce M., Bauer G., Bedeschi F., Beecher D., Behari S., Bellettini G., Bellinger J., Benjamin D., Beretvas A., Bhatti A., Binkley M.,

Fuente: Physical Review D - Particles, Fields, Gravitation and Cosmology, 2011, 83(7), 071102(R)

Publisher: American Physical Society

Publication date: 01/04/2011

No. of pages: 8

Publication type: Article

DOI: 10.1103/PhysRevD.83.071102

ISSN: 1550-7998,1550-2368,2470-0010,2470-0029

Publication Url: https://doi.org/10.1103/PhysRevD.83.071102

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