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Measurement of spin correlation in top-antitop quark events and search for top squark pair production in pp collisions at √s=8  TeV using the ATLAS detector.

Publication ,  Journal Article
Aad, G; Abbott, B; Abdallah, J; Abdel Khalek, S; Abdinov, O; Aben, R; Abi, B; Abolins, M; AbouZeid, OS; Abramowicz, H; Abreu, H; Abreu, R ...
Published in: Physical review letters
April 2015

A measurement of spin correlation in tt[over ¯] production is presented using data collected with the ATLAS detector at the Large Hadron Collider in proton-proton collisions at a center-of-mass energy of 8 TeV, corresponding to an integrated luminosity of 20.3  fb^{-1}. The correlation between the top and antitop quark spins is extracted from dilepton tt[over ¯] events by using the difference in the azimuthal angle between the two charged leptons in the laboratory frame. In the helicity basis the measured degree of correlation corresponds to A_{helicity}=0.38±0.04, in agreement with the standard model prediction. A search is performed for pair production of top squarks with masses close to the top quark mass decaying to predominantly right-handed top quarks and a light neutralino, the lightest supersymmetric particle. Top squarks with masses between the top quark mass and 191 GeV are excluded at the 95% confidence level.

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Published In

Physical review letters

DOI

EISSN

1079-7114

ISSN

0031-9007

Publication Date

April 2015

Volume

114

Issue

14

Start / End Page

142001

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., Abdinov, O., Aben, R., … Colombo, T. (2015). Measurement of spin correlation in top-antitop quark events and search for top squark pair production in pp collisions at √s=8  TeV using the ATLAS detector. Physical Review Letters, 114(14), 142001. https://doi.org/10.1103/physrevlett.114.142001
Aad, G., B. Abbott, J. Abdallah, S. Abdel Khalek, O. Abdinov, R. Aben, B. Abi, et al. “Measurement of spin correlation in top-antitop quark events and search for top squark pair production in pp collisions at √s=8  TeV using the ATLAS detector.Physical Review Letters 114, no. 14 (April 2015): 142001. https://doi.org/10.1103/physrevlett.114.142001.
Aad G, Abbott B, Abdallah J, Abdel Khalek S, Abdinov O, Aben R, et al. Measurement of spin correlation in top-antitop quark events and search for top squark pair production in pp collisions at √s=8  TeV using the ATLAS detector. Physical review letters. 2015 Apr;114(14):142001.
Aad, G., et al. “Measurement of spin correlation in top-antitop quark events and search for top squark pair production in pp collisions at √s=8  TeV using the ATLAS detector.Physical Review Letters, vol. 114, no. 14, Apr. 2015, p. 142001. Epmc, doi:10.1103/physrevlett.114.142001.
Aad G, Abbott B, Abdallah J, Abdel Khalek S, Abdinov O, Aben R, Abi B, Abolins M, AbouZeid OS, Abramowicz H, Abreu H, Abreu R, Abulaiti Y, Acharya BS, Adamczyk L, Adams DL, Adelman J, Adomeit S, Adye T, Agatonovic-Jovin T, Aguilar-Saavedra JA, Agustoni M, Ahlen SP, Ahmadov F, Aielli G, Akerstedt H, Åkesson TPA, Akimoto G, Akimov AV, Alberghi GL, Albert J, Albrand S, Alconada Verzini MJ, Aleksa M, Aleksandrov IN, Alexa C, Alexander G, Alexandre G, Alexopoulos T, Alhroob M, Alimonti G, Alio L, Alison J, Allbrooke BMM, Allison LJ, Allport PP, Aloisio A, Alonso A, Alonso F, Alpigiani C, Altheimer A, Alvarez Gonzalez B, Alviggi MG, Amako K, Amaral Coutinho Y, Amelung C, Amidei D, Amor Dos Santos SP, Amorim A, Amoroso S, Amram N, Amundsen G, Anastopoulos C, Ancu LS, Andari N, Andeen T, Anders CF, Anders G, Anderson KJ, Andreazza A, Andrei V, Anduaga XS, Angelidakis S, Angelozzi I, Anger P, Angerami A, Anghinolfi F, Anisenkov AV, Anjos N, Annovi A, Antonelli M, Antonov A, Antos J, Anulli F, Aoki M, Aperio Bella L, Arabidze G, Arai Y, Araque JP, Arce ATH, Arduh FA, Arguin J-F, Argyropoulos S, Arik M, Armbruster AJ, Arnaez O, Arnal V, Arnold H, Arratia M, Arslan O, Artamonov A, Artoni G, Asai S, Asbah N, Ashkenazi A, Åsman B, Asquith L, Assamagan K, Astalos R, Atkinson M, Atlay NB, Auerbach B, Augsten K, Aurousseau M, Avolio G, Axen B, Azuelos G, Azuma Y, Baak MA, Baas AE, Bacci C, Bachacou H, Bachas K, Backes M, Backhaus M, Badescu E, Bagiacchi P, Bagnaia P, Bai Y, Bain T, Baines JT, Baker OK, Balek P, Balli F, Banas E, Banerjee S, Bannoura AAE, Bansil HS, Barak L, Baranov SP, Barberio EL, Barberis D, Barbero M, Barillari T, Barisonzi M, Barklow T, Barlow N, Barnes SL, Barnett BM, Barnett RM, Barnovska Z, Baroncelli A, Barone G, Barr AJ, Barreiro F, Barreiro Guimarães da Costa J, Bartoldus R, Barton AE, Bartos P, Bartsch V, Bassalat A, Basye A, Bates RL, Batista SJ, Batley JR, Battaglia M, Battistin M, Bauer F, Bawa HS, Beacham JB, Beattie MD, Beau T, Beauchemin PH, Beccherle R, Bechtle P, Beck HP, Becker K, Becker S, Beckingham M, Becot C, Beddall AJ, Beddall A, Bedikian S, Bednyakov VA, Bee CP, Beemster LJ, Beermann TA, Begel M, Behr K, Belanger-Champagne C, Bell PJ, Bell WH, Bella G, Bellagamba L, Bellerive A, Bellomo M, Belotskiy K, Beltramello O, Benary O, Benchekroun D, Bendtz K, Benekos N, Benhammou Y, Benhar Noccioli E, Benitez Garcia JA, Benjamin DP, Bensinger JR, Bentvelsen S, Berge D, Bergeaas Kuutmann E, Berger N, Berghaus F, Beringer J, Bernard C, Bernard NR, Bernius C, Bernlochner FU, Berry T, Berta P, Bertella C, Bertoli G, Bertolucci F, Bertsche C, Bertsche D, Besana MI, Besjes GJ, Bessidskaia Bylund O, Bessner M, Besson N, Betancourt C, Bethke S, Bevan AJ, Bhimji W, Bianchi RM, Bianchini L, Bianco M, Biebel O, Bieniek SP, Bierwagen K, Biglietti M, Bilbao De Mendizabal J, Bilokon H, Bindi M, Binet S, Bingul A, Bini C, Black CW, Black JE, Black KM, Blackburn D, Blair RE, Blanchard J-B, Blazek T, Bloch I, Blocker C, Blum W, Blumenschein U, Bobbink GJ, Bobrovnikov VS, Bocchetta SS, Bocci A, Bock C, Boddy CR, Boehler M, Boek TT, Bogaerts JA, Bogdanchikov AG, Bogouch A, Bohm C, Boisvert V, Bold T, Boldea V, Boldyrev AS, Bomben M, Bona M, Boonekamp M, Borisov A, Borissov G, Borroni S, Bortfeldt J, Bortolotto V, Bos K, Boscherini D, Bosman M, Boterenbrood H, Boudreau J, Bouffard J, Bouhova-Thacker EV, Boumediene D, Bourdarios C, Bousson N, Boutouil S, Boveia A, Boyd J, Boyko IR, Bozic I, Bracinik J, Brandt A, Brandt G, Brandt O, Bratzler U, Brau B, Brau JE, Braun HM, Brazzale SF, Brelier B, Brendlinger K, Brennan AJ, Brenner R, Bressler S, Bristow K, Bristow TM, Britton D, Brochu FM, Brock I, Brock R, Bronner J, Brooijmans G, Brooks T, Brooks WK, Brosamer J, Brost E, Brown J, Bruckman de Renstrom PA, Bruncko D, Bruneliere R, Brunet S, Bruni A, Bruni G, Bruschi M, Bryngemark L, Buanes T, Buat Q, Bucci F, Buchholz P, Buckley AG, Buda SI, Budagov IA, Buehrer F, Bugge L, Bugge MK, Bulekov O, Bundock AC, Burckhart H, Burdin S, Burghgrave B, Burke S, Burmeister I, Busato E, Büscher D, Büscher V, Bussey P, Buszello CP, Butler B, Butler JM, Butt AI, Buttar CM, Butterworth JM, Butti P, Buttinger W, Buzatu A, Byszewski M, Cabrera Urbán S, Caforio D, Cakir O, Calafiura P, Calandri A, Calderini G, Calfayan P, Caloba LP, Calvet D, Calvet S, Camacho Toro R, Camarda S, Cameron D, Caminada LM, Caminal Armadans R, Campana S, Campanelli M, Campoverde A, Canale V, Canepa A, Cano Bret M, Cantero J, Cantrill R, Cao T, Capeans Garrido MDM, Caprini I, Caprini M, Capua M, Caputo R, Cardarelli R, Carli T, Carlino G, Carminati L, Caron S, Carquin E, Carrillo-Montoya GD, Carter JR, Carvalho J, Casadei D, Casado MP, Casolino M, Castaneda-Miranda E, Castelli A, Castillo Gimenez V, Castro NF, Catastini P, Catinaccio A, Catmore JR, Cattai A, Cattani G, Caudron J, Cavaliere V, Cavalli D, Cavalli-Sforza M, Cavasinni V, Ceradini F, Cerio BC, Cerny K, Cerqueira AS, Cerri A, Cerrito L, Cerutti F, Cerv M, Cervelli A, Cetin SA, Chafaq A, Chakraborty D, Chalupkova I, Chang P, Chapleau B, Chapman JD, Charfeddine D, Charlton DG, Chau CC, Chavez Barajas CA, Cheatham S, Chegwidden A, Chekanov S, Chekulaev SV, Chelkov GA, Chelstowska MA, Chen C, Chen H, Chen K, Chen L, Chen S, Chen X, Chen Y, Cheng HC, Cheng Y, Cheplakov A, Cheremushkina E, Cherkaoui El Moursli R, Chernyatin V, Cheu E, Chevalier L, Chiarella V, Chiefari G, Childers JT, Chilingarov A, Chiodini G, Chisholm AS, Chislett RT, Chitan A, Chizhov MV, Chouridou S, Chow BKB, Chromek-Burckhart D, Chu ML, Chudoba J, Chwastowski JJ, Chytka L, Ciapetti G, Ciftci AK, Ciftci R, Cinca D, Cindro V, Ciocio A, Citron ZH, Citterio M, Ciubancan M, Clark A, Clark PJ, Clarke RN, Cleland W, Clemens JC, Clement C, Coadou Y, Cobal M, Coccaro A, Cochran J, Coffey L, Cogan JG, Cole B, Cole S, Colijn AP, Collot J, Colombo T. Measurement of spin correlation in top-antitop quark events and search for top squark pair production in pp collisions at √s=8  TeV using the ATLAS detector. Physical review letters. 2015 Apr;114(14):142001.

Published In

Physical review letters

DOI

EISSN

1079-7114

ISSN

0031-9007

Publication Date

April 2015

Volume

114

Issue

14

Start / End Page

142001

Related Subject Headings

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