Title
Measurement of the charge asymmetry in highly boosted top-quark pair production in √s=8 TeV pp collision data collected by the ATLAS experiment
Date Issued
10 May 2016
Access level
open access
Resource Type
journal article
Author(s)
Aad G.
Abbott B.
Abdallah J.
Abdinov O.
Abeloos B.
Aben R.
Abolins M.
AbouZeid O.S.
Abramowicz H.
Abreu H.
Abreu R.
Abulaiti Y.
Acharya B.S.
Adamczyk L.
Adams D.L.
Adelman J.
Adomeit S.
Adye T.
Affolder A.A.
Agatonovic-Jovin T.
Agricola J.
Aguilar-Saavedra J.A.
Ahlen S.P.
Ahmadov F.
Aielli G.
Akerstedt H.
Åkesson T.P.A.
Akimov A.V.
Alberghi G.L.
Albert J.
Albrand S.
Alconada Verzini M.J.
Aleksa M.
Aleksandrov I.N.
Alexa C.
Alexander G.
Alexopoulos T.
Alhroob M.
Alimonti G.
Alison J.
Alkire S.P.
Allbrooke B.M.M.
Allen B.W.
Allport P.P.
Aloisio A.
Alonso A.
Alonso F.
Alpigiani C.
Alvarez Gonzalez B.
Álvarez Piqueras D.
Alviggi M.G.
Amadio B.T.
Amako K.
Amaral Coutinho Y.
Amelung C.
Amidei D.
Amor Dos Santos S.P.
Amorim A.
Amoroso S.
Amram N.
Amundsen G.
Anastopoulos C.
Ancu L.S.
Andari N.
Andeen T.
Anders C.F.
Anders G.
Anders J.K.
Anderson K.J.
Andreazza A.
Andrei V.
Angelidakis S.
Angelozzi I.
Anger P.
Angerami A.
Anghinolfi F.
Anisenkov A.V.
Anjos N.
Annovi A.
Antonelli M.
Antonov A.
Antos J.
Anulli F.
Aoki M.
Aperio Bella L.
Arabidze G.
Arai Y.
Araque J.P.
Arce A.T.H.
Arduh F.A.
Arguin J.F.
Argyropoulos S.
Arik M.
Armbruster A.J.
Armitage L.J.
Arnaez O.
Arnold H.
Arratia M.
Arslan O.
Artamonov A.
Publisher(s)
Elsevier B.V.
Abstract
In the pp→tt¯ process the angular distributions of top and anti-top quarks are expected to present a subtle difference, which could be enhanced by processes not included in the Standard Model. This Letter presents a measurement of the charge asymmetry in events where the top-quark pair is produced with a large invariant mass. The analysis is performed on 20.3 fb−1 of pp collision data at s=8TeV collected by the ATLAS experiment at the LHC, using reconstruction techniques specifically designed for the decay topology of highly boosted top quarks. The charge asymmetry in a fiducial region with large invariant mass of the top-quark pair (mtt¯>0.75 TeV) and an absolute rapidity difference of the top and anti-top quark candidates within −2<|yt|−|yt¯|<2 is measured to be 4.2±3.2%, in agreement with the Standard Model prediction at next-to-leading order. A differential measurement in three tt¯ mass bins is also presented.
Start page
52
End page
71
Volume
756
Language
English
OCDE Knowledge area
Física nuclear
Física de partículas, Campos de la Física
Scopus EID
2-s2.0-85042466567
Source
Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
ISSN of the container
03702693
Sponsor(s)
We acknowledge the support of ANPCyT , Argentina; YerPhI , Armenia; ARC , Australia; BMWFW and FWF , Austria; ANAS , Azerbaijan; SSTC , Belarus; CNPq and FAPESP , Brazil; NSERC , NRC and CFI , Canada; CERN ; CONICYT , Chile; CAS , MOST and NSFC , China; COLCIENCIAS , Colombia; MSMT CR , MPO CR and VSC CR , Czech Republic; DNRF , DNSRC and Lundbeck Foundation , Denmark; IN2P3-CNRS , CEA-DSM/IRFU , France; GNSF , Georgia; BMBF , HGF , and MPG , Germany; GSRT , Greece; RGC , Hong Kong SAR , China; ISF , I-CORE and Benoziyo Center , Israel; INFN , Italy; MEXT and JSPS , Japan; CNRST , Morocco; FOM and NWO , Netherlands; RCN , Norway; MNiSW and NCN , Poland; FCT , Portugal; MNE/IFA , Romania; MES of Russia and NRC KI , Russian Federation; JINR ; MESTD , Serbia; MSSR , Slovakia; ARRS and MIZŠ , Slovenia; DST/NRF , South Africa; MINECO , Spain; SRC and Wallenberg Foundation , Sweden; SERI , SNSF and Cantons of Bern and Geneva , Switzerland; MOST , Taiwan; TAEK , Turkey; STFC , United Kingdom; DOE and NSF , United States of America. In addition, individual groups and members have received support from BCKDF , the Canada Council , CANARIE , CRC , Compute Canada , FQRNT , and the Ontario Innovation Trust , Canada; EPLANET , ERC , FP7 , Horizon 2020 and Marie Skłodowska-Curie Actions , European Union; Investissements d'Avenir Labex and Idex , ANR , Region Auvergne and Fondation Partager le Savoir , France; DFG and AvH Foundation , Germany; Herakleitos , Thales and Aristeia programmes co-financed by EU-ESF and the Greek NSRF ; BSF , GIF and Minerva , Israel; BRF , Norway; the Royal Society and Leverhulme Trust , United Kingdom.
Sources of information:
Directorio de Producción Científica
Scopus