Title
Measurement of the correlation between the polar angles of leptons from top quark decays in the helicity basis at s =7 T e V using the ATLAS detector
Date Issued
13 January 2016
Access level
open access
Resource Type
journal article
Author(s)
Aad G.
Abbott B.
Abdallah J.
Abdinov O.
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.
Alio L.
Alison J.
Alkire S.P.
Allbrooke B.M.M.
Allport P.P.
Aloisio A.
Alonso A.
Alonso F.
Alpigiani C.
Altheimer A.
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.
Arnaez O.
Arnold H.
Arratia M.
Arslan O.
Artamonov A.
Artoni G.
Publisher(s)
American Physical Society
Abstract
A measurement of the correlations between the polar angles of leptons from the decay of pair-produced t and t¯ quarks in the helicity basis is reported, using proton-proton collision data collected by the ATLAS detector at the LHC. The dataset corresponds to an integrated luminosity of 4.6 fb-1 at a center-of-mass energy of s=7 TeV collected during 2011. Candidate events are selected in the dilepton topology with large missing transverse momentum and at least two jets. The angles θ1 and θ2 between the charged leptons and the direction of motion of the parent quarks in the tt¯ rest frame are sensitive to the spin information, and the distribution of cosθ1·cosθ2 is sensitive to the spin correlation between the t and t¯ quarks. The distribution is unfolded to parton level and compared to the next-to-leading order prediction. A good agreement is observed.
Volume
93
Issue
1
Language
English
OCDE Knowledge area
Física de partículas, Campos de la Física
Física atómica, molecular y química
Scopus EID
2-s2.0-84956625743
Source
Physical Review D
ISSN of the container
24700010
Sponsor(s)
National Science Foundation - 1119200, 1410972, 1506173.
Science and Technology Facilities Council - GRIDPP, PP/D002915/1, PP/E000347/1, PP/E000355/1, PP/E000444/1, PP/E002846/1, ST/G50228X/1, ST/H00100X/1, ST/H00100X/2, ST/H001093/1, ST/H001093/2, ST/I000119/1, ST/I000178/1, ST/I003533/1, ST/I00372X/1, ST/I006056/1, ST/J00474X/1, ST/J004979/1, ST/J005487/1, ST/J005525/1, ST/K000039/1, ST/K000705/1, ST/K00073X/1, ST/K001248/1, ST/K001302/1, ST/K001310/1, ST/K001329/1, ST/K001361/1, ST/K00137X/1, ST/K00140X/1, ST/K001418/1, ST/K003895/1, ST/L001144/1, ST/L001179/1, ST/L001195/1, ST/L003112/1, ST/L003414/1, ST/L00352X/1, ST/L006111/1, ST/M000761/1, ST/M001407/1, ST/M001431/1, ST/M001474/1, ST/M001504/1, ST/M001733/1, ST/M002306/1, ST/M004937/1, ST/M006980/1, ST/N000277/1, ST/N000307/1, ST/N000463/1.
Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung - 156083.
Sources of information:
Directorio de Producción Científica
Scopus