Limits on the production of the standard model Higgs boson in pp collisions at \sqrt{s} = 7 TeV with the ATLAS detector

G Aad, B Abbott, J Abdallah,A A Abdelalim,A Abdesselam, O Abdinov,B Abi, M Abolins, H Abramowicz, H Abreu, E Acerbi,B S Acharya,D L Adams, T N Addy,J Adelman,M Aderholz, S Adomeit,P Adragna,T Adye,S Aefsky,J A Aguilarsaavedra,M Aharrouche, S P Ahlen,F Ahles,A Ahmad, M Ahsan,G Aielli,T Akdogan,Torsten Akesson, G Akimoto,A V Akimov,A Akiyama,M A Alam, S Albrand,M Aleksa,I N Aleksandrov, F Alessandria,C Alexa, G Alexander,G Alexandre, T Alexopoulos,M Alhroob,M Aliev, G Alimonti,J Alison,M Aliyev,P P Allport,S E Allwoodspiers,J Almond, A Aloisio, R Alon,Alejandro Alonso,M G Alviggi, K Amako,P Amaral,C Amelung,V V Ammosov,A Amorim, Gabriel Amoros, N Amram,C Anastopoulos,N Andari, T Andeen,C F Anders,K J Anderson,A Andreazza, V Andrei,Ml Andrieux,X S Anduaga,A Angerami, F Anghinolfi,N Anjos, A Annovi, A Antonaki,M Antonelli,A Antonov, J Antos, F Anulli,S Aoun,L Aperio Bella, R Apolle, G Arabidze, I Aracena,Yasuo Arai, A T H Arce,J P Archambault, S Arfaoui,Jf Arguin,E Arik,M Arik, A J Armbruster, O Arnaez, C Arnault, A Artamonov,G Artoni, D Arutinov, S Asai,R Asfandiyarov, S Ask, B Asman,L Asquith,K Assamagan, A Astbury,A Astvatsatourov,G Atoian,B Aubert,B Auerbach, E Auge, K Augsten, M Aurousseau,N Austin,R Avramidou, D Axen,C Ay,G Azuelos, Y Azuma, M A Baak,G Baccaglioni, C Bacci,A M Bach, H Bachacou,K Bachas,G Bachy,Moritz Backes,Malte Backhaus, E Badescu, P Bagnaia,S Bahinipati,Y Bai,D C Bailey, T Bain,J T Baines,O K Baker,Mark Baker,Sarah M Baker,F Baltasar Dos Santos Pedrosa,E Banas,P Banerjee,Sw Banerjee, D Banfi, A Bangert,Vikas Bansal, H S Bansil,L Barak,S P Baranov,A Barashkou,A Barbaro Galtieri,T Barber,E Barberio, D Barberis,M Barbero,D Y Bardin,T Barillari,M Barisonzi, T Barklow, N R Barlow, B M Barnett,R M Barnett, A Baroncelli,A J Barr,F Barreiro,J Barreiro Guimaraes Da Costa,P Barrillon, R Bartoldus, A E Barton,D Bartsch, V Bartsch, R L Bates, L Batkova, J R Batley,Andreas Battaglia, M Battistin,G Battistoni, F Bauer, H S Bawa,B Beare,T Beau,P H Beauchemin, R Beccherle, P Bechtle,H P Beck, M Beckingham, K H Becks, A J Beddall, S Bedikian,V A Bednyakov,C P Bee,M Begel,S Behar Harpaz,P K Behera,M Beimforde,C Belangerchampagne,P J Bell, W H Bell,G Bella, L Bellagamba, Francesco Bellina,Massimiliano Bellomo,A Belloni,O Beloborodova, K Belotskiy,O Beltramello,S Ben Ami, O Benary,D Benchekroun, C Benchouk,M Bendel, B H Benedict,N Benekos, Y Benhammou, D Benjamin, M Benoit, J R Bensinger,K Benslama, S Bentvelsen,D Berge,E Bergeaas Kuutmann,N Berger,F Berghaus, E Berglund,J Beringer,K Bernardet, P Bernat, R Bernhard, C Bernius, T Berry,A Bertin,F Bertinelli,F Bertolucci, M I Besana,N Besson,Siegfried Bethke, W Bhimji,R M Bianchi,M Bianco, O Biebel, S P Bieniek, J Biesiada, M Biglietti, H Bilokon,M Bindi,S Binet, A Bingul, C Bini, C Biscarat,U Bitenc,K M Black,R E Blair,J B Blanchard,G Blanchot, T Blazek,C Blocker, J Blocki, A Blondel, W Blum, U Blumenschein,G J Bobbink,Victor Bobrovnikov,Simona Serena Bocchetta, A Bocci, C R Boddy, M Boehler, J Boek,N Boelaert,S Boeser, J A Bogaerts,Alexander Bogdanchikov,A Bogouch,Christian Bohm, V Boisvert, T Bold, V Boldea,N M Bolnet,M Bona,V G Bondarenko, M Boonekamp, G Boorman,C N Booth,S Bordoni, C Borer,Anatoly Borisov,G Borissov,I Borjanovic,S Borroni, K Bos, D Boscherini,M Bosman, H Boterenbrood,D R Botterill,J Bouchami, J Boudreau,E V Bouhovathacker, C Boulahouache, C Bourdarios, N Bousson, A Boveia,J T Boyd, I Boyko,N I Bozhko,I Bozovicjelisavcic,J Bracinik,A Braem,P Branchini,G Brandenburg,A Brandt, G Brandt,Oleg Brandt, U Bratzler, B Brau,J Brau, H M Braun, B Brelier,J Bremer, R Brenner,S Bressler,D Breton,D Britton, F M Brochu,Gordon D A Brown,Heather Brown,P A Bruckman De Renstrom, D Bruncko, R Bruneliere, S Brunet, A Bruni,G Bruni, M Bruschi, T Buanes, F Bucci,J Buchanan,N J Buchanan,Peter Buchholz, R M Buckingham,A G Buckley, S I Budaa, I A Budagov, B Budick,V Buescher, L Bugge,D Buiraclark, O Bulekov, M Bunse, T Buran, H J Burckhart,S Burdin,Thomas Burgess,Steven D Burke,E Busato

European Physical Journal C（2011）

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摘要

A search for the Standard Model Higgs boson at the Large Hadron Collider (LHC) running at a centre-of-mass energy of 7 TeV is reported, based on a total integrated luminosity of up to 40 pb−1 collected by the ATLAS detector in 2010. Several Higgs boson decay channels: H→γγ, H→ZZ (∗)→ℓℓℓℓ, H→ZZ→ℓℓνν, H→ZZ→ℓℓqq, H→WW (∗)→ℓνℓν and H→WW→ℓνqq (ℓ is e, μ) are combined in a mass range from 110 GeV to 600 GeV. The highest sensitivity is achieved in the mass range between 160 GeV and 170 GeV, where the expected 95% CL exclusion sensitivity is at Higgs boson production cross sections 2.3 times the Standard Model prediction. Upper limits on the cross section for its production are determined. Models with a fourth generation of heavy leptons and quarks with Standard Model-like couplings to the Higgs boson are also investigated and are excluded at 95% CL for a Higgs boson mass in the range from 140 GeV to 185 GeV.

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sensitivity,physics,massless particles,background,natural sciences,atlas,lhc

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