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Observation of spin correlation in tt¯ events from pp collisions at √s=7 TeV using the ATLAS detector.

Publication ,  Journal Article
Aad, G; Abbott, B; Abdallah, J; Abdel Khalek, S; Abdelalim, AA; Abdesselam, A; Abdinov, O; Abi, B; Abolins, M; Abouzeid, OS; Abramowicz, H ...
Published in: Physical review letters
May 2012

A measurement of spin correlation in tt[over ¯] production is reported using data collected with the ATLAS detector at the LHC, corresponding to an integrated luminosity of 2.1 fb(-1). Candidate events are selected in the dilepton topology with large missing transverse energy and at least two jets. The difference in azimuthal angle between the two charged leptons in the laboratory frame is used to extract the correlation between the top and antitop quark spins. In the helicity basis the measured degree of correlation corresponds to A(helicity)=0.40(-0.08)(+0.09), in agreement with the next-to-leading-order standard model prediction. The hypothesis of zero spin correlation is excluded at 5.1 standard deviations.

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Published In

Physical review letters

DOI

EISSN

1079-7114

ISSN

0031-9007

Publication Date

May 2012

Volume

108

Issue

21

Start / End Page

212001

Related Subject Headings

  • General Physics
  • 51 Physical sciences
  • 49 Mathematical sciences
  • 40 Engineering
  • 09 Engineering
  • 02 Physical Sciences
  • 01 Mathematical Sciences
 

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Aad, G., Abbott, B., Abdallah, J., Abdel Khalek, S., Abdelalim, A. A., Abdesselam, A., … Cleland, W. (2012). Observation of spin correlation in tt¯ events from pp collisions at √s=7 TeV using the ATLAS detector. Physical Review Letters, 108(21), 212001. https://doi.org/10.1103/physrevlett.108.212001
Aad, G., B. Abbott, J. Abdallah, S. Abdel Khalek, A. A. Abdelalim, A. Abdesselam, O. Abdinov, et al. “Observation of spin correlation in tt¯ events from pp collisions at √s=7 TeV using the ATLAS detector.Physical Review Letters 108, no. 21 (May 2012): 212001. https://doi.org/10.1103/physrevlett.108.212001.
Aad G, Abbott B, Abdallah J, Abdel Khalek S, Abdelalim AA, Abdesselam A, et al. Observation of spin correlation in tt¯ events from pp collisions at √s=7 TeV using the ATLAS detector. Physical review letters. 2012 May;108(21):212001.
Aad, G., et al. “Observation of spin correlation in tt¯ events from pp collisions at √s=7 TeV using the ATLAS detector.Physical Review Letters, vol. 108, no. 21, May 2012, p. 212001. Epmc, doi:10.1103/physrevlett.108.212001.
Aad G, Abbott B, Abdallah J, Abdel Khalek S, Abdelalim AA, Abdesselam A, Abdinov O, Abi B, Abolins M, Abouzeid OS, Abramowicz H, Abreu H, Acerbi E, Acharya BS, Adamczyk L, Adams DL, Addy TN, Adelman J, Aderholz M, Adomeit S, Adragna P, Adye T, Aefsky S, Aguilar-Saavedra JA, Aharrouche M, Ahlen SP, Ahles F, Ahmad A, Ahsan M, Aielli G, Akdogan T, Akesson TPA, Akimoto G, Akimov AV, Akiyama A, Alam MS, Alam MA, Albert J, Albrand S, Aleksa M, Aleksandrov IN, Alessandria F, Alexa C, Alexander G, Alexandre G, Alexopoulos T, Alhroob M, Aliev M, Alimonti G, Alison J, Aliyev M, Allbrooke BMM, Allport PP, Allwood-Spiers SE, Almond J, Aloisio A, Alon R, Alonso A, Alvarez Gonzalez B, Alviggi MG, Amako K, Amaral P, Amelung C, Ammosov VV, Amorim A, Amorós G, Amram N, Anastopoulos C, Ancu LS, Andari N, Andeen T, Anders CF, Anders G, Anderson KJ, Andreazza A, Andrei V, Andrieux M-L, Anduaga XS, Angerami A, Anghinolfi F, Anisenkov A, Anjos N, Annovi A, Antonaki A, Antonelli M, Antonov A, Antos J, Anulli F, Aoun S, Bella LA, Apolle R, Arabidze G, Aracena I, Arai Y, Arce ATH, Arfaoui S, Arguin J-F, Arik E, Arik M, Armbruster AJ, Arnaez O, Arnal V, Arnault C, Artamonov A, Artoni G, Arutinov D, Asai S, Asfandiyarov R, Ask S, Asman B, Asquith L, Assamagan K, Astbury A, Astvatsatourov A, Aubert B, Auge E, Augsten K, Aurousseau M, Avolio G, Avramidou R, Axen D, Ay C, Azuelos G, Azuma Y, Baak MA, Baccaglioni G, Bacci C, Bach AM, Bachacou H, Bachas K, Backes M, Backhaus M, Badescu E, Bagnaia P, Bahinipati S, Bai Y, Bailey DC, Bain T, Baines JT, Baker OK, Baker MD, Baker S, Banas E, Banerjee P, Banerjee S, Banfi D, Bangert A, Bansal V, Bansil HS, Barak L, Baranov SP, Barashkou A, Barbaro Galtieri A, Barber T, Barberio EL, Barberis D, Barbero M, Bardin DY, Barillari T, Barisonzi M, Barklow T, Barlow N, Barnett BM, Barnett RM, Baroncelli A, Barone G, Barr AJ, Barreiro F, da Costa JBG, Barrillon P, Bartoldus R, Barton AE, Bartsch V, Bates RL, Batkova L, Batley JR, Battaglia A, Battistin M, Bauer F, Bawa HS, Beale S, Beau T, Beauchemin PH, Beccherle R, Bechtle P, Beck HP, Becker S, Beckingham M, Becks KH, Beddall AJ, Beddall A, Bedikian S, Bednyakov VA, Bee CP, Begel M, Harpaz SB, Behera PK, Beimforde M, Belanger-Champagne C, Bell PJ, Bell WH, Bella G, Bellagamba L, Bellina F, Bellomo M, Belloni A, Beloborodova O, Belotskiy K, Beltramello O, Benary O, Benchekroun D, Benchouk C, Bendel M, Benekos N, Benhammou Y, Benhar Noccioli E, Benitez Garcia JA, Benjamin DP, Benoit M, Bensinger JR, Benslama K, Bentvelsen S, Berge D, Kuutmann EB, Berger N, Berghaus F, Berglund E, Beringer J, Bernat P, Bernhard R, Bernius C, Berry T, Bertella C, Bertin A, Bertinelli F, Bertolucci F, Besana MI, Besson N, Bethke S, Bhimji W, Bianchi RM, Bianco M, Biebel O, Bieniek SP, Bierwagen K, Biesiada J, Biglietti M, Bilokon H, Bindi M, Binet S, Bingul A, Bini C, Biscarat C, Bitenc U, Black KM, Blair RE, Blanchard J-B, Blanchot G, Blazek T, Blocker C, Blocki J, Blondel A, Blum W, Blumenschein U, Bobbink GJ, Bobrovnikov VB, Bocchetta SS, Bocci A, Boddy CR, Boehler M, Boek J, Boelaert N, Bogaerts JA, Bogdanchikov A, Bogouch A, Bohm C, Bohm J, Boisvert V, Bold T, Boldea V, Bolnet NM, Bomben M, Bona M, Bondarenko VG, Bondioli M, Boonekamp M, Booth CN, Bordoni S, Borer C, Borisov A, Borissov G, Borjanovic I, Borri M, Borroni S, Bortolotto V, Bos K, Boscherini D, Bosman M, Boterenbrood H, Botterill D, Bouchami J, Boudreau J, Bouhova-Thacker EV, Boumediene D, Bourdarios C, Bousson N, Boveia A, Boyd J, Boyko IR, Bozhko NI, Bozovic-Jelisavcic I, Bracinik J, Braem A, Branchini P, Brandenburg GW, Brandt A, Brandt G, Brandt O, Bratzler U, Brau B, Brau JE, Braun HM, Brelier B, Bremer J, Brendlinger K, Brenner R, Bressler S, Britton D, Brochu FM, Brock I, Brock R, Brodbeck TJ, Brodet E, Broggi F, Bromberg C, Bronner J, Brooijmans G, Brooks WK, Brown G, Brown H, Bruckman de Renstrom PA, Bruncko D, Bruneliere R, Brunet S, Bruni A, Bruni G, Bruschi M, Buanes T, Buat Q, Bucci F, Buchanan J, Buchanan NJ, Buchholz P, Buckingham RM, Buckley AG, Buda SI, Budagov IA, Budick B, Büscher V, Bugge L, Bulekov O, Bunse M, Buran T, Burckhart H, Burdin S, Burgess T, Burke S, Busato E, Bussey P, Buszello CP, Butin F, Butler B, Butler JM, Buttar CM, Butterworth JM, Buttinger W, Cabrera Urbán S, Caforio D, Cakir O, Calafiura P, Calderini G, Calfayan P, Calkins R, Caloba LP, Caloi R, Calvet D, Calvet S, Camacho Toro R, Camarri P, Cambiaghi M, Cameron D, Caminada LM, Campana S, Campanelli M, Canale V, Canelli F, Canepa A, Cantero J, Capasso L, Capeans Garrido MDM, Caprini I, Caprini M, Capriotti D, Capua M, Caputo R, Cardarelli R, Carli T, Carlino G, Carminati L, Caron B, Caron S, Carquin E, Carrillo Montoya GD, Carter AA, Carter JR, Carvalho J, Casadei D, Casado MP, Cascella M, Caso C, Castaneda Hernandez AM, Castaneda-Miranda E, Castillo Gimenez V, Castro NF, Cataldi G, Cataneo F, Catinaccio A, Catmore JR, Cattai A, Cattani G, Caughron S, Cauz D, Cavalleri P, Cavalli D, Cavalli-Sforza M, Cavasinni V, Ceradini F, Cerqueira AS, Cerri A, Cerrito L, Cerutti F, Cetin SA, Cevenini F, Chafaq A, Chakraborty D, Chan K, Chapleau B, Chapman JD, Chapman JW, Chareyre E, Charlton DG, Chavda V, Chavez Barajas CA, Cheatham S, Chekanov S, Chekulaev SV, Chelkov GA, Chelstowska MA, Chen C, Chen H, Chen S, Chen T, Chen X, Cheng S, Cheplakov A, Chepurnov VF, El Moursli RC, Chernyatin V, Cheu E, Cheung SL, Chevalier L, Chiefari G, Chikovani L, Childers JT, Chilingarov A, Chiodini G, Chisholm AS, Chislett RT, Chizhov MV, Choudalakis G, Chouridou S, Christidi IA, Christov A, Chromek-Burckhart D, Chu ML, Chudoba J, Ciapetti G, Ciftci AK, Ciftci R, Cinca D, Cindro V, Ciobotaru MD, Ciocca C, Ciocio A, Cirilli M, Citterio M, Ciubancan M, Clark A, Clark PJ, Cleland W. Observation of spin correlation in tt¯ events from pp collisions at √s=7 TeV using the ATLAS detector. Physical review letters. 2012 May;108(21):212001.

Published In

Physical review letters

DOI

EISSN

1079-7114

ISSN

0031-9007

Publication Date

May 2012

Volume

108

Issue

21

Start / End Page

212001

Related Subject Headings

  • General Physics
  • 51 Physical sciences
  • 49 Mathematical sciences
  • 40 Engineering
  • 09 Engineering
  • 02 Physical Sciences
  • 01 Mathematical Sciences