Search for Higgs boson pair production in the two bottom quarks plus two photons final state in collisions at with the ATLAS detector
Articolo
Data di Pubblicazione:
2022
Abstract:
Searches are performed for nonresonant and resonant di-Higgs boson production in the b (b) over bar gamma gamma final state. The dataset used corresponds to an integrated luminosity of 139 fb(-1) of proton-proton collisions at a center-of- mass energy of 13 TeV recorded by the ATLAS detector at the CERN Large Hadron Collider. No excess above the expected background is found and upper limits on the di-Higgs boson production cross sections are set. A 95% confidence-level upper limit of 4.2 times the cross section predicted by the Standard Model is set on pp -> HH nonresonant production, where the expected limit is 5.7 times the Standard Model predicted value. The expected constraints are obtained for a background hypothesis excluding pp -> HH production. The observed (expected) constraints on the Higgs boson trilinear coupling modifier kappa(lambda) are determined to be [-1.5, 6.7] ([-2.4, 7.7]) at 95% confidence level, where the expected constraints on kappa(lambda) are obtained excluding pp -> HH production from the background hypothesis. For resonant production of a new hypothetical scalar particle X (X -> HH -> b (b) over bar gamma gamma), limits on the cross section for pp -> X -> HH are presented in the narrow-width approximation as a function of m x in the range 251 GeV <= m(X) <= 1000 GeV. The observed (expected) limits on the cross section for pp ->> X -> HH range from 640 fb to 44 fb (391 fb to 46 fb) over the considered mass range.
Tipologia CRIS:
1.1 Articolo in rivista
Keywords:
Particle physics, High energy physics
Elenco autori:
Aad, G.; Abbott, B.; Abbott, D. ???C.; Abed Abud, A.; Abeling, K.; Abhayasinghe, D. ???K.; Abidi, S. ???H.; Abramowicz, H.; Abreu, H.; Abulaiti, Y.; Abusleme Hoffman, A. ???C.; Acharya, B. ???S.; Achkar, B.; Adam, L.; Adam Bourdarios, C.; Adamczyk, L.; Adamek, L.; Adelman, J.; Adiguzel, A.; Adorni, S.; Adye, T.; Affolder, A. ???A.; Afik, Y.; Agapopoulou, C.; Agaras, M. ???N.; Agarwala, J.; Aggarwal, A.; Agheorghiesei, C.; Aguilar-Saavedra, J. ???A.; Ahmad, A.; Ahmadov, F.; Ahmed, W. ???S.; Ai, X.; Aielli, G.; Akatsuka, S.; Akbiyik, M.; ??kesson, T. ???P. ???A.; Akimov, A. ???V.; Al Khoury, K.; Alberghi, G. ???L.; Albert, J.; Alconada Verzini, M. ???J.; Alderweireldt, S.; Aleksa, M.; Aleksandrov, I. ???N.; Alexa, C.; Alexopoulos, T.; Alfonsi, A.; Alfonsi, F.; Alhroob, M.; Ali, B.; Ali, S.; Aliev, M.; Alimonti, G.; Allaire, C.; Allbrooke, B. ???M. ???M.; Allport, P. ???P.; Aloisio, A.; Alonso, F.; Alpigiani, C.; Alunno Camelia, E.; Alvarez Estevez, M.; Alviggi, M. ???G.; Amaral Coutinho, Y.; Ambler, A.; Ambroz, L.; Amelung, C.; Amidei, D.; Amor Dos Santos, S. ???P.; Amoroso, S.; Amrouche, C. ???S.; Anastopoulos, C.; Andari, N.; Andeen, T.; Anders, J. ???K.; Andrean, S. ???Y.; Andreazza, A.; Andrei, V.; Angelidakis, S.; Angerami, A.; Anisenkov, A. ???V.; Annovi, A.; Antel, C.; Anthony, M. ???T.; Antipov, E.; Antonelli, M.; Antrim, D. ???J. ???A.; Anulli, F.; Aoki, M.; Aparisi Pozo, J. ???A.; Aparo, M. ???A.; Aperio Bella, L.; Aranzabal, N.; Araujo Ferraz, V.; Arcangeletti, C.; Arce, A. ???T. ???H.; Arena, E.; Arguin, J-F.; Argyropoulos, S.; Arling, J. -H.; Armbruster, A. ???J.; Armstrong, A.; Arnaez, O.; Arnold, H.; Arrubarrena Tame, Z. ???P.; Artoni, G.; Asada, H.; Asai, K.; Asai, S.; Asbah, N. ???A.; Asimakopoulou, E. ???M.; Asquith, L.; Assahsah, J.; Assamagan, K.; Astalos, R.; Atkin, R. ???J.; Atkinson, M.; Atlay, N. ???B.; Atmani, H.; Atmasiddha, P. ???A.; Augsten, K.; Auricchio, S.; Austrup, V. ???A.; Avner, G.; Avolio, G.; Ayoub, M. ???K.; Azuelos, G.; Babal, D.; Bachacou, H.; Bachas, K.; Backman, F.; Badea, A.; Bagnaia, P.; Bahrasemani, H.; Bailey, A. ???J.; Bailey, V. ???R.; Baines, J. ???T.; Bakalis, C.; Baker, O. ???K.; Bakker, P. ???J.; Bakos, E.; Bakshi Gupta, D.; Balaji, S.; Balasubramanian, R.; Baldin, E. ???M.; Balek, P.; Ballabene, E.; Balli, F.; Balunas, W. ???K.; Balz, J.; Banas, E.; Bandieramonte, M.; Bandyopadhyay, A.; Barak, L.; Barberio, E. ???L.; Barberis, D.; Barbero, M.; Barbour, G.; Barends, K. ???N.; Barillari, T.; Barisits, M-S.; Barkeloo, J.; Barklow, T.; Barnett, B. ???M.; Barnett, R. ???M.; Baroncelli, A.; Barone, G.; Barr, A. ???J.; Barranco Navarro, L.; Barreiro, F.; Barreiro Guimar??es da Costa, J.; Barron, U.; Barsov, S.; Bartels, F.; Bartoldus, R.; Bartolini, G.; Barton, A. ???E.; Bartos, P.; Basalaev, A.; Basan, A.; Bashta, I.; Bassalat, A.; Basso, M. ???J.; Basson, C. ???R.; Bates, R. ???L.; Batlamous, S.; Batley, J. ???R.; Batool, B.; Battaglia, M.; Bauce, M.; Bauer, F.; Bauer, P.; Bawa, H. ???S.; Bayirli, A.; Beacham, J. ???B.; Beau, T.; Beauchemin, P. ???H.; Becherer, F.; Bechtle, P.; Beck, H. ???P.; Becker, K.; Becot, C.; Beddall, A. ???J.; Bednyakov, V. ???A.; Bee, C. ???P.; Beermann, T. ???A.; Begalli, M.; Begel, M.; Behera, A.; Behr, J. ???K.; Beirao Da Cruz E Silva, C.; Beirer, J. ???F.; Beisiegel, F.; Belfkir, M.; Bella, G.; Bellagamba, L.; Bellerive, A.; Bellos, P.; Beloborodov, K.; Belotskiy, K.; Belyaev, N. ???L.; Benchekroun, D.; Benhammou, Y.; Benjamin, D. ???P.; Benoit, M.; Bensinger, J. ???R.; Bentvelsen, S.; Beresford, L.; Beretta, M.; Berge, D.; Bergeaas Kuutmann, E.; Berger, N.; Bergmann, B.; Bergsten, L. ???J.; Beringer, J.; Berlendis, S.; Bernardi, G.; Bernius, C.; Bernlochner, F. ???U.; Berry, T.; Berta, P.; Berthold, A.; Bertram, I. ???A.; Bessidskaia Bylund, O.; Bethke, S.; Betti, A.; Bevan, A. ???J.; Bhatta, S.; Bhattacharya, D. ???S.; Bhattarai, P.; Bhopatkar, V. ???S.; Bi, R.; Bianchi, R. ???M.; Biebel, O.; Bielski, R.; Biesuz, N. ???V.; Biglietti, M.; Billoud, T.
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