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Observation of Long-Range Elliptic Azimuthal Anisotropies in sqrt[s]=13 and 2.76 TeV pp Collisions with the ATLAS Detector.

Publication ,  Journal Article
Aad, G; Abbott, B; Abdallah, J; Abdinov, O; Aben, R; Abolins, M; AbouZeid, OS; Abramowicz, H; Abreu, H; Abreu, R; Abulaiti, Y; Acharya, BS ...
Published in: Physical review letters
April 2016

ATLAS has measured two-particle correlations as a function of the relative azimuthal angle, Δϕ, and pseudorapidity, Δη, in sqrt[s]=13 and 2.76 TeV pp collisions at the LHC using charged particles measured in the pseudorapidity interval |η|<2.5. The correlation functions evaluated in different intervals of measured charged-particle multiplicity show a multiplicity-dependent enhancement at Δϕ∼0 that extends over a wide range of Δη, which has been referred to as the "ridge." Per-trigger-particle yields, Y(Δϕ), are measured over 2<|Δη|<5. For both collision energies, the Y(Δϕ) distribution in all multiplicity intervals is found to be consistent with a linear combination of the per-trigger-particle yields measured in collisions with less than 20 reconstructed tracks, and a constant combinatoric contribution modulated by cos(2Δϕ). The fitted Fourier coefficient, v_{2,2}, exhibits factorization, suggesting that the ridge results from per-event cos(2ϕ) modulation of the single-particle distribution with Fourier coefficients v_{2}. The v_{2} values are presented as a function of multiplicity and transverse momentum. They are found to be approximately constant as a function of multiplicity and to have a p_{T} dependence similar to that measured in p+Pb and Pb+Pb collisions. The v_{2} values in the 13 and 2.76 TeV data are consistent within uncertainties. These results suggest that the ridge in pp collisions arises from the same or similar underlying physics as observed in p+Pb collisions, and that the dynamics responsible for the ridge has no strong sqrt[s] dependence.

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Published In

Physical review letters

DOI

EISSN

1079-7114

ISSN

0031-9007

Publication Date

April 2016

Volume

116

Issue

17

Start / End Page

172301

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., Abdinov, O., Aben, R., Abolins, M., … Colombo, T. (2016). Observation of Long-Range Elliptic Azimuthal Anisotropies in sqrt[s]=13 and 2.76 TeV pp Collisions with the ATLAS Detector. Physical Review Letters, 116(17), 172301. https://doi.org/10.1103/physrevlett.116.172301
Aad, G., B. Abbott, J. Abdallah, O. Abdinov, R. Aben, M. Abolins, O. S. AbouZeid, et al. “Observation of Long-Range Elliptic Azimuthal Anisotropies in sqrt[s]=13 and 2.76 TeV pp Collisions with the ATLAS Detector.Physical Review Letters 116, no. 17 (April 2016): 172301. https://doi.org/10.1103/physrevlett.116.172301.
Aad G, Abbott B, Abdallah J, Abdinov O, Aben R, Abolins M, et al. Observation of Long-Range Elliptic Azimuthal Anisotropies in sqrt[s]=13 and 2.76 TeV pp Collisions with the ATLAS Detector. Physical review letters. 2016 Apr;116(17):172301.
Aad, G., et al. “Observation of Long-Range Elliptic Azimuthal Anisotropies in sqrt[s]=13 and 2.76 TeV pp Collisions with the ATLAS Detector.Physical Review Letters, vol. 116, no. 17, Apr. 2016, p. 172301. Epmc, doi:10.1103/physrevlett.116.172301.
Aad G, Abbott B, Abdallah J, Abdinov O, Aben R, Abolins M, AbouZeid OS, Abramowicz H, Abreu H, Abreu R, Abulaiti Y, Acharya BS, Adamczyk L, Adams DL, Adelman J, Adomeit S, Adye T, Affolder AA, Agatonovic-Jovin T, Agricola J, Aguilar-Saavedra JA, Ahlen SP, Ahmadov F, Aielli G, Akerstedt H, Åkesson TPA, Akimov AV, Alberghi GL, Albert J, Albrand S, Alconada Verzini MJ, Aleksa M, Aleksandrov IN, Alexa C, Alexander G, Alexopoulos T, Alhroob M, Alimonti G, Alio L, Alison J, Alkire SP, Allbrooke BMM, Allport PP, Aloisio A, Alonso A, Alonso F, Alpigiani C, Altheimer A, Alvarez Gonzalez B, Álvarez Piqueras D, Alviggi MG, Amadio BT, 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, Anders JK, Anderson KJ, Andreazza A, Andrei V, 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, Arnold H, Arratia M, Arslan O, Artamonov A, Artoni G, Artz S, Asai S, Asbah N, Ashkenazi A, Åsman B, Asquith L, Assamagan K, Astalos R, Atkinson M, Atlay NB, Augsten K, Aurousseau M, Avolio G, Axen B, Ayoub MK, Azuelos G, Baak MA, Baas AE, Baca MJ, Bacci C, Bachacou H, Bachas K, Backes M, Backhaus M, Bagiacchi P, Bagnaia P, Bai Y, Bain T, Baines JT, Baker OK, Baldin EM, Balek P, Balestri T, Balli F, Balunas WK, Banas E, Banerjee S, Bannoura AAE, Barak L, 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, Basalaev A, Bassalat A, Basye A, Bates RL, Batista SJ, Batley JR, Battaglia M, Bauce M, Bauer F, Bawa HS, Beacham JB, Beattie MD, Beau T, Beauchemin PH, Beccherle R, Bechtle P, Beck HP, Becker K, Becker M, Beckingham M, Becot C, Beddall AJ, Beddall A, Bednyakov VA, Bee CP, Beemster LJ, Beermann TA, Begel M, Behr JK, Belanger-Champagne C, Bell WH, Bella G, Bellagamba L, Bellerive A, Bellomo M, Belotskiy K, Beltramello O, Benary O, Benchekroun D, Bender M, Bendtz K, Benekos N, Benhammou Y, Benhar Noccioli E, Benitez Garcia JA, Benjamin DP, Bensinger JR, Bentvelsen S, Beresford L, Beretta M, 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, Biedermann D, Biesuz NV, Biglietti M, Bilbao De Mendizabal J, Bilokon H, Bindi M, Binet S, Bingul A, Bini C, Biondi S, Bjergaard DM, Black CW, Black JE, Black KM, Blackburn D, Blair RE, Blanchard J-B, Blanco JE, Blazek T, Bloch I, Blocker C, Blum W, Blumenschein U, Blunier S, Bobbink GJ, Bobrovnikov VS, Bocchetta SS, Bocci A, Bock C, Boehler M, Bogaerts JA, Bogavac D, Bogdanchikov AG, 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, Boudreau J, Bouffard J, Bouhova-Thacker EV, Boumediene D, Bourdarios C, Bousson N, Boutle SK, Boveia A, Boyd J, Boyko IR, Bozic I, Bracinik J, Brandt A, Brandt G, Brandt O, Bratzler U, Brau B, Brau JE, Braun HM, Breaden Madden WD, Brendlinger K, Brennan AJ, Brenner L, Brenner R, Bressler S, Bristow TM, Britton D, Britzger D, Brochu FM, Brock I, Brock R, Bronner J, Brooijmans G, Brooks T, Brooks WK, Brosamer J, Brost E, Bruckman de Renstrom PA, Bruncko D, Bruneliere R, Bruni A, Bruni G, Bruschi M, Bruscino N, Bryngemark L, Buanes T, Buat Q, Buchholz P, Buckley AG, Budagov IA, Buehrer F, Bugge L, Bugge MK, Bulekov O, Bullock D, Burckhart H, Burdin S, Burgard CD, Burghgrave B, Burke S, Burmeister I, Busato E, Büscher D, Büscher V, Bussey P, Butler JM, Butt AI, Buttar CM, Butterworth JM, Butti P, Buttinger W, Buzatu A, Buzykaev AR, Cabrera Urbán S, Caforio D, Cairo VM, Cakir O, Calace N, Calafiura P, Calandri A, Calderini G, Calfayan P, Caloba LP, Calvet D, Calvet S, Camacho Toro R, Camarda S, Camarri P, Cameron D, 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, Carbone RM, Cardarelli R, Cardillo F, Carli T, Carlino G, Carminati L, Caron S, Carquin E, Carrillo-Montoya GD, Carter JR, Carvalho J, Casadei D, Casado MP, Casolino M, Casper DW, Castaneda-Miranda E, Castelli A, Castillo Gimenez V, Castro NF, Catastini P, Catinaccio A, Catmore JR, Cattai A, Caudron J, Cavaliere V, Cavalli D, Cavalli-Sforza M, Cavasinni V, Ceradini F, Cerda Alberich L, Cerio BC, Cerny K, Cerqueira AS, Cerri A, Cerrito L, Cerutti F, Cerv M, Cervelli A, Cetin SA, Chafaq A, Chakraborty D, Chalupkova I, Chan YL, Chang P, Chapman JD, 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, Chiarelli G, Chiodini G, Chisholm AS, Chislett RT, Chitan A, Chizhov MV, Choi K, Chouridou S, Chow BKB, Christodoulou V, Chromek-Burckhart D, Chudoba J, Chuinard AJ, Chwastowski JJ, Chytka L, Ciapetti G, Ciftci AK, Cinca D, Cindro V, Cioara IA, Ciocio A, Cirotto F, Citron ZH, Ciubancan M, Clark A, Clark BL, Clark PJ, Clarke RN, Clement C, Coadou Y, Cobal M, Coccaro A, Cochran J, Coffey L, Colasurdo L, Cole B, Cole S, Colijn AP, Collot J, Colombo T. Observation of Long-Range Elliptic Azimuthal Anisotropies in sqrt[s]=13 and 2.76 TeV pp Collisions with the ATLAS Detector. Physical review letters. 2016 Apr;116(17):172301.

Published In

Physical review letters

DOI

EISSN

1079-7114

ISSN

0031-9007

Publication Date

April 2016

Volume

116

Issue

17

Start / End Page

172301

Related Subject Headings

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