Search for quark contact interactions in dijet angular distributions in pp collisions at root s=7 TeV measured 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 , M Ackers , D L Adams , T N Addy , J Adelman , M Aderholz , S Adomeit , C Adorisio , R Adragna , T Adye , S Aefsky , J A Aguilarsaavedra , M Aharrouche , S P Ahlen , F Ahles , A Ahmad , H U Ahmed , M Ahsan , G Aielli , T Akdogan , Torsten Akesson , G Akimoto , A V Akimov , A Aktas , M A Alam , S Albrand , M Aleksa , I N Aleksandrov , M Aleppo , F Alessandria , C Alexa , Gideon 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 , J M Alonso , M G Alviggi , K Amako , P Amaral , G Ambrosio , C Amelung , V V Ammosov , Antonio Amorim , G Amoros , N Amram , C Anastopoulos , T Andeen , C F Anders , K J Anderson , A Andreazza , V Andrei , M L Andrieux , X S Anduaga , A Angerami , F Anghinolfi , Nuno Anjos , A Annovi , A Antonaki , M Antonelli , S Antonelli , J Antos , B Antunovic , F Anulli , S Aoun , R Apolle , G Arabidze , I Aracena , Yasuo Arai , A T H Arce , J P Archambault , S Arfaoui , J F Arguin , T Argyropoulos , E Arik , M Arik , A J Armbruster , K Arms , S R Armstrong , O Arnaez , C Arnault , A Artamonov , D Arutinov , Masato Asai , S Asai , R Asfandiyarov , S Ask , B Asman , D M Asner , L Asquith , K Assamagan , A Astbury , A Astvatsatourov , G Atoian , B Aubert , B Auerbach , E Auge , K Augsten , M Aurousseau , N Austin , Giuseppe Avolio , 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 , E Badescu , P Bagnaia , Y Bai , D C Bailey , T Bain , J T Baines , O K Baker , M D Baker , Stephen Baker , F Baltasar Dos Santos Pedrosa , E Banas , Piyali Banerjee , Sw Banerjee , D Banfi , A Bangert , V Bansal , S P Baranov , A Barashkou , A Barbaro Galtieri , T Barber , E Barberio , D Barberis , Marlon Barbero , D Y Bardin , T Barillari , M Barisonzi , T Barklow , N R Barlow , B M Barnett , R M Barnett , A Baroncelli , M Barone , Alan Barr , F Barreiro , J Barreiro Guimaraes Da Costa , P Barrillon , R Bartoldus , D Bartsch , R L Bates , L Batkova , J R Batley , A Battaglia , M Battistin , G Battistoni , F Bauer , H S Bawa , M Bazalova , B Beare , T Beau , P H Beauchemin , R Beccherle , R Bechtle , G A Beck , H P Beck , M Beckingham , K H Becks , A J Beddall , V A Bednyakov , Christopher Bee , M Begel , S Behar Harpaz , P K Behera , M Beimforde , C Belangerchampagne , B Belhorma , P J Bell , W H Bell , G Bella , L Bellagamba , Francesco Bellina , G Bellomo , Massimiliano Bellomo , A Belloni , K Belotskiy , O Beltramello , S Ben Ami , O Benary , D Benchekroun , C Benchouk , M Bendel , B H Benedict , N Benekos , Y Benhammou , G P Benincasa , D Benjamin , Mathieu Benoit , J R Bensinger , K Benslama , S Bentvelsen , M Beretta , 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 , S Bertolucci , M I Besana , N Besson , Siegfried Bethke , W Bhimji , R M Bianchi , Michele Bianco , O Biebel , J Biesiada , M Biglietti , H Bilokon , M Binder , M Bindi , S Binet , A Bingul , C Bini , C Biscarat , Richard Bischof , U Bitenc , K M Black , R E Blair , J B Blanchard , G Blanchot , C Blocker , J Blocki , A Blondel , W Blum , U Blumenschein , C Boaretto , G J Bobbink , A Bocci , David F Bocian , R Bock , C R Boddy , M Boehler , J Boek , N Boelaert , S Boeser , J A Bogaerts , A Bogouch , Christian Bohm , J Bohm , V Boisvert , T Bold , V Boldea , V G Bondarenko , M Bondioli , M Boonekamp , G Boorman , C N Booth , P S L Booth , J 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 , A Boveia , J Boyd , I Boyko , N I Bozhko , I Bozovicjelisavcic , S Braccini , J Bracinik , A Braem , Elisabeth Brambilla , 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 , Shikma Bressler , D Breton , N D Brett , P C Brightthomas , D Britton , F M Brochu , I Brock , R Brock , T J Brodbeck , E Brodet , F Broggi , C Bromberg , G Brooijmans , W K Brooks , Gordon D A Brown , E Brubaker , P A Bruckman De Renstrom , D Bruncko , R Bruneliere , S Brunet PHYSICS LETTERS B（2011）
摘要
Dijet angular distributions from the first LHC pp collisions at center-of-mass energy root s = 7 TeV have been measured with the ATLAS detector. The dataset used for this analysis represents an integrated luminosity of 3.1 pb(-1). Dijet chi distributions and centrality ratios have been measured up to dijet masses of 2.8 TeV, and found to be in good agreement with Standard Model predictions. Analysis of the chi distributions excludes quark contact interactions with a compositeness scale Lambda below 3.4 TeV, at 95% confidence level, significantly exceeding previous limits. (C) 2010 CERN. Published by Elsevier B.V. All rights reserved.
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关键词
ATLAS, LHC, 7 TeV, Dijets angular distributions, Quark compositeness, Contact interactions
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