作者
Morad Aaboud, Georges Aad, Brad Abbott, B Abeloos, DK Abhayasinghe, SH Abidi, OS AbouZeid, NL Abraham, H Abramowicz, H Abreu, Y Abulaiti, BS Acharya, S Adachi, L Adamczyk, J Adelman, M Adersberger, Aytül Adiguzel, T Adye, AA Affolder, Y Afik, C Agheorghiesei, JA Aguilar-Saavedra, F Ahmadov, G Aielli, S Akatsuka, TPA Åkesson, E Akilli, AV Akimov, GL Alberghi, J Albert, P Albicocco, MJ Alconada Verzini, S Alderweireldt, M Aleksa, IN Aleksandrov, C Alexa, T Alexopoulos, M Alhroob, B Ali, M Aliev, Gianluca Alimonti, John Alison, Steven Patrick Alkire, Corentin Allaire, BMM Allbrooke, Benjamin William Allen, PP Allport, Alberto Aloisio, Alejandro Alonso, Francisco Alonso, Cristiano Alpigiani, Azzah Aziz Alshehri, MI Alstaty, B Alvarez Gonzalez, D Álvarez Piqueras, MG Alviggi, Brian Thomas Amadio, Y Amaral Coutinho, Luca Ambroz, Christoph Amelung, D Amidei, SP Amor Dos Santos, Simone Amoroso, Cherifa Sabrina Amrouche, Christos Anastopoulos, Lucian Stefan Ancu, Nansi Andari, Timothy Andeen, Christoph Falk Anders, John Kenneth Anders, KJ Anderson, Attilio Andreazza, V Andrei, Christopher Ryan Anelli, Stylianos Angelidakis, Ivan Angelozzi, Aaron Angerami, AV Anisenkov, Alberto Annovi, Claire Antel, Matthew Thomas Anthony, Mario Antonelli, DJA Antrim, Fabio Anulli, Masato Aoki, L Aperio Bella, G Arabidze, JP Araque, V Araujo Ferraz, R Araujo Pereira, ATH Arce, RE Ardell, FA Arduh, JF Arguin, S Argyropoulos, AJ Armbruster, LJ Armitage, A Armstrong III, O Arnaez, H Arnold, M Arratia, O Arslan, A Artamonov, G Artoni, S Artz, S Asai, N Asbah, EM Asimakopoulou, L Asquith, K Assamagan, R Astalos, RJ Atkin, M Atkinson, NB Atlay, K Augsten, G Avolio, R Avramidou, MK Ayoub, G Azuelos, AE Baas, MJ Baca, H Bachacou, K Bachas, M Backes, P Bagnaia, M Bahmani, H Bahrasemani, AJ Bailey, JT Baines, M Bajic, C Bakalis, OK Baker, PJ Bakker, D Bakshi Gupta, EM Baldin, P Balek, F Balli, WK Balunas, J Balz, E Banas, A Bandyopadhyay, Sw Banerjee, AAE Bannoura, L Barak, WM Barbe, EL Barberio, D Barberis, M Barbero, T Barillari, MS Barisits
发表日期
2018/9/10
期刊
Physics Letters B
卷号
784
页码范围
173-191
出版商
North-Holland
简介
The observation of Higgs boson production in association with a top quark pair (t t¯ H), based on the analysis of proton–proton collision data at a centre-of-mass energy of 13 TeV recorded with the ATLAS detector at the Large Hadron Collider, is presented. Using data corresponding to integrated luminosities of up to 79.8 fb− 1, and considering Higgs boson decays into b b¯, W W⁎, τ+ τ−, γγ, and Z Z⁎, the observed significance is 5.8 standard deviations, compared to an expectation of 4.9 standard deviations. Combined with the t t¯ H searches using a dataset corresponding to integrated luminosities of 4.5 fb− 1 at 7 TeV and 20.3 fb− 1 at 8 TeV, the observed (expected) significance is 6.3 (5.1) standard deviations. Assuming Standard Model branching fractions, the total t t¯ H production cross section at 13 TeV is measured to be 670±90 (stat.)− 100+ 110 (syst.) fb, in agreement with the Standard Model prediction.
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