Measurement of the tt-bar production cross section in pp- bar collisions at [sqrt]s=1.96TeV using soft electron b- tagging
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Citation CDF Collaboration et al. " Measurement of the tt-bar production cross section in pp-bar collisions at s=1.96 TeV using soft electron b-tagging. Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use. The MIT Faculty has made this article openly available. Please share how this access benefits you. Your story matters. Measurement of the t t production cross section in p p collisions at ffiffi ffi s p ¼ 1:96 TeV using soft electron b-tagging MEASUREMENT OF THE t " t PRODUCTION CROSS. .. We present a measurement of the top-quark pair-production cross section in p " p collisions at ffiffi ffi s p ¼ 1:96 TeV using a data sample corresponding to 1:7 fb À1 of integrated luminosity collected with the Collider Detector at Fermilab. We reconstruct t " t events in the lepton þ jets channel, consisting of e þ jets and þ jets final states. The dominant background is the production of W bosons in association with multiple jets. To suppress this background, we identify electrons from the semileptonic decay of heavy-flavor jets (''soft electron tags''). From a sample of 2196 candidate events, we obtain 120 tagged events with a background expectation of 51 AE 3 events, corresponding to a cross section of t" t ¼ 7:8 AE 2:4ðstatÞ AE 1:6ðsystÞ AE 0:5ðlumiÞ pb. We assume a top-quark mass of 175 GeV=c 2. This is the first measurement of the t " t cross section with soft electron tags in run II of the Tevatron.
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Citation Aaltonen, T. et al.(CDF Collaboration). "Measurement of the tt[over-bar] production cross section in pp[over-bar] collisions at [sqrt]s=1.96TeV using events with large missing transverse energy and jets. Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use. The MIT Faculty has m...
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تاریخ انتشار 2010