Search for W H associated production in 5.3 fb(-1) of p(p)over-bar collisions at the Fermilab Tevatron V M Abazov , B Abbott , B S Acharya , M Adams , T Adams , G D Alexeev , G Alkhazov , A Alton , G Alverson , G A Alves , L S Ancu , Masahiro Aoki , M Arov , A Askew , B Asman , O Atramentov , C Avila , J Backusmayes , F Badaud , L Bagby , B Baldin , D V Bandurin , S Banerjee , E Barberis , P Baringer , J Barreto , J F Bartlett , U Bassler , V E Bazterra , S Beale , A Bean , M Begalli , M Begel , C Belangerchampagne , L Bellantoni , S B Beri , G Bernardi , R Bernhard , I Bertram , M Besancon , R Beuselinck , V A Bezzubov , P C Bhat , V Bhatnagar , G Blazey , S Blessing , K Bloom , A Boehnlein , D Boline , T A Bolton , E E Boos , G Borissov , T Bose , A Brandt , Oleg Brandt , R Brock , G Brooijmans , A Bross , D A Brown , J S Brown , X B Bu , M Buehler , V Buescher , V Bunichev , S Burdin , T H Burnett , C P Buszello , B Calpas , E Camachoperez , M A Carrascolizarraga , B C K Casey , H 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Vertogradov , M Verzocchi , M Vesterinen , D Vilanova , P Vint , P Vokac , H D Wahl , M H L S Wang , J Warchol , G Watts , M Wayne , M Weber , L Weltyrieger , A E White , D Wicke , M R J Williams , G W Wilson , S J Wimpenny , M Wobisch , D R Wood , T R Wyatt , Yuan Xie , C Xu , S Yacoob , R Yamada , W C Yang , T Yasuda , Y A Yatsunenko , Z Ye , H Yin , K Yip , S W Youn , Jun Yu , S Zelitch , Tingting Zhao , Boping Zhou , Jing Zhu , M Zielinski , D Zieminska , L Zivkovic Physics Letters B（2011）
摘要
We present a search for associated production of Higgs and W bosons in pp¯ collisions at a center of mass energy of s=1.96TeV in 5.3 fb−1 of integrated luminosity recorded by the D0 experiment. Multivariate analysis techniques are applied to events containing one lepton, an imbalance in transverse energy, and one or two b-tagged jets to discriminate a potential WH signal from Standard Model backgrounds. We observe good agreement between data and expected backgrounds, and set an upper limit of 4.5 (at 95% confidence level and for mH=115GeV) on the ratio of the WH cross section multiplied by the branching fraction of H→bb¯ to its Standard Model prediction, which is consistent with an expected limit of 4.8.
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Tevatron, Standard Model, Higgs boson, Electroweak symmetry breaking
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