Measurement of the cross-section of high transverse momentum vector bosons reconstructed as single jets and studies of jet substructure in pp collisions at $\sqrt{s}$ = 7 TeV with the ATLAS detector

• Published in: New journal of physics Vol. 16; no. 11; p. 113013
• Main Authors: Aad, G, Abajyan, T, Abbott, B, Abdallah, J, Khalek, S Abdel, Abdinov, O, Aben, R, Abi, B, Abolins, M, AbouZeid, O S, Abramowicz, H, Abreu, H, Abulaiti, Y, Acharya, B S, Adamczyk, L, Adams, D L, Addy, T N, Adelman, J, Adomeit, S, Adye, T, Agatonovic-Jovin, T, Aguilar-Saavedra, J A, Agustoni, M, Ahlen, S P, Ahmadov, F, Aielli, G, Åkesson, T P A, Akimoto, G, Akimov, A V, Albert, J, Albrand, S, Alconada Verzini, M J, Aleksa, M, Aleksandrov, I N, Alexa, C, Alexander, G, Alexandre, G, Alexopoulos, T, Alhroob, M, Alimonti, G, Alio, L, Alison, J, Allbrooke, B M M, Allison, L J, Allport, P P, Allwood-Spiers, S E, Almond, J, Aloisio, A, Alon, R, Alonso, A, Alonso, F, Alpigiani, C, Altheimer, A, Gonzalez, B Alvarez, Alviggi, M G, Amako, K, Coutinho, Y Amaral, Amelung, C, Ammosov, V V, 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, Anderson, K J, Andreazza, A, Andrei, V, Anduaga, X S, Angelidakis, S, Anger, P, Angerami, A, Anghinolfi, F, Anisenkov, A V, Anjos, N, Annovi, A, Antonaki, A, Antonelli, M, Antonov, A, Antos, J, Anulli, F, Aoki, M, Aperio Bella, L, Apolle, R, Arabidze, G, Aracena, I, Arai, Y, Arce, A T H, Arguin, J-F, Argyropoulos, S, Arik, E, Arik, M, Armbruster, A J, Arnaez, O, Arnal, V
• Format: Journal Article
• Language: English
• Published: United States IOP Publishing 04-11-2014
• Subjects: boosted; hadronic W; jet substructure; PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
• ISSN: 1367-2630; 1367-2630
• DOI: 10.1088/1367-2630/16/11/113013

This article presents a measurement of the cross-section for high transverse momentum W and Z bosons produced in pp collisions and decaying to all-hadronic final states. The data used in the analysis were recorded by the ATLAS detector at the CERN Large Hadron Collider at a centre-of-mass energy of $\sqrt{s}=7\;{\rm Te}{\rm V}$ and correspond to an integrated luminosity of $4.6\;{\rm f}{{{\rm b}}^{-1}}$. The measurement is performed by reconstructing the boosted W or Z bosons in single jets. The reconstructed jet mass is used to identify the W and Z bosons, and a jet substructure method based on energy cluster information in the jet centre-of-mass frame is used to suppress the large multi-jet background. The cross-section for events with a hadronically decaying W or Z boson, with transverse momentum ${{p}_{{\rm T}}}\gt 320\;{\rm Ge}{\rm V}$ and pseudorapidity $|\eta |\lt 1.9$, is measured to be ${{\sigma }_{W+Z}}=8.5\pm 1.7$ pb and is compared to next-to-leading-order calculations. The selected events are further used to study jet grooming techniques.