Search for triple Higgs boson production in the final state using collisions at with the ATLAS detector
Physical Review D (particles, fields, gravitation, and cosmology) American Physical Society 111:3 (2025) 32006
Authors:
G Aad, E Aakvaag, B Abbott, S Abdelhameed, K Abeling, Nj Abicht, Sh Abidi, M Aboelela, A Aboulhorma, H Abramowicz, Y Abulaiti, Bs Acharya, A Ackermann, C Adam Bourdarios, L Adamczyk, Sv Addepalli, Mj Addison, J Adelman, A Adiguzel, T Adye, Aa Affolder, Y Afik, Mn Agaras, A Aggarwal, C Agheorghiesei, F Ahmadov, S Ahuja, X Ai, G Aielli, A Aikot, M Ait Tamlihat, B Aitbenchikh, M Akbiyik, Tpa Åkesson, Av Akimov, D Akiyama, Nn Akolkar, S Aktas, Gl Alberghi, J Albert, P Albicocco, Gl Albouy, S Alderweireldt, Zl Alegria, M Aleksa, In Aleksandrov, C Alexa, T Alexopoulos, F Alfonsi, M AlgrenAbstract:
<jats:p>A search for the production of three Higgs bosons (<a:math xmlns:a="http://www.w3.org/1998/Math/MathML" display="inline"><a:mi>H</a:mi><a:mi>H</a:mi><a:mi>H</a:mi></a:math>) in the <c:math xmlns:c="http://www.w3.org/1998/Math/MathML" display="inline"><c:mi>b</c:mi><c:mover accent="true"><c:mi>b</c:mi><c:mo stretchy="false">¯</c:mo></c:mover><c:mi>b</c:mi><c:mover accent="true"><c:mi>b</c:mi><c:mo stretchy="false">¯</c:mo></c:mover><c:mi>b</c:mi><c:mover accent="true"><c:mi>b</c:mi><c:mo stretchy="false">¯</c:mo></c:mover></c:math> final state is presented. The search uses <k:math xmlns:k="http://www.w3.org/1998/Math/MathML" display="inline"><k:mn>126</k:mn><k:mtext> </k:mtext><k:mtext> </k:mtext><k:msup><k:mi>fb</k:mi><k:mrow><k:mo>−</k:mo><k:mn>1</k:mn></k:mrow></k:msup></k:math> of proton-proton collision data at <m:math xmlns:m="http://www.w3.org/1998/Math/MathML" display="inline"><m:msqrt><m:mi>s</m:mi></m:msqrt><m:mo>=</m:mo><m:mn>13</m:mn><m:mtext> </m:mtext><m:mtext> </m:mtext><m:mi>TeV</m:mi></m:math> collected with the ATLAS detector at the Large Hadron Collider. The analysis targets both nonresonant and resonant production of <o:math xmlns:o="http://www.w3.org/1998/Math/MathML" display="inline"><o:mi>H</o:mi><o:mi>H</o:mi><o:mi>H</o:mi></o:math>. The resonant interpretations primarily consider a cascade decay topology of <q:math xmlns:q="http://www.w3.org/1998/Math/MathML" display="inline"><q:mi>X</q:mi><q:mo stretchy="false">→</q:mo><q:mi>S</q:mi><q:mi>H</q:mi><q:mo stretchy="false">→</q:mo><q:mi>H</q:mi><q:mi>H</q:mi><q:mi>H</q:mi></q:math> with masses of the new scalars <u:math xmlns:u="http://www.w3.org/1998/Math/MathML" display="inline"><u:mi>X</u:mi></u:math> and <w:math xmlns:w="http://www.w3.org/1998/Math/MathML" display="inline"><w:mi>S</w:mi></w:math> up to 1.5 and 1 TeV, respectively. In addition to scenarios where <y:math xmlns:y="http://www.w3.org/1998/Math/MathML" display="inline"><y:mi>S</y:mi></y:math> is off-shell, the nonresonant interpretation includes a search for Standard Model <ab:math xmlns:ab="http://www.w3.org/1998/Math/MathML" display="inline"><ab:mi>H</ab:mi><ab:mi>H</ab:mi><ab:mi>H</ab:mi></ab:math> production, with limits on the trilinear and quartic Higgs self-coupling set. No evidence for <cb:math xmlns:cb="http://www.w3.org/1998/Math/MathML" display="inline"><cb:mi>H</cb:mi><cb:mi>H</cb:mi><cb:mi>H</cb:mi></cb:math> production is observed. An upper limit of 59 fb is set, at the 95% confidence level, on the cross section for Standard Model <eb:math xmlns:eb="http://www.w3.org/1998/Math/MathML" display="inline"><eb:mi>H</eb:mi><eb:mi>H</eb:mi><eb:mi>H</eb:mi></eb:math> production.</jats:p> <jats:sec> <jats:title/> <jats:supplementary-material> <jats:permissions> <jats:copyright-statement>© 2025 CERN, for the ATLAS Collaboration</jats:copyright-statement> <jats:copyright-year>2025</jats:copyright-year> <jats:copyright-holder>CERN</jats:copyright-holder> </jats:permissions> </jats:supplementary-material> </jats:sec>Search for a light charged Higgs boson in t→H±b decays, with H±→cs, in pp collisions at s=13TeV with the ATLAS detector
European Physical Journal C Springer Nature 85:2 (2025) 153
Authors:
G Aad, E Aakvaag, B Abbott, S Abdelhameed, K Abeling, NJ Abicht, SH Abidi, M Aboelela, A Aboulhorma, H Abramowicz, H Abreu, Y Abulaiti, BS Acharya, A Ackermann, C Adam Bourdarios, L Adamczyk, SV Addepalli, MJ Addison, J Adelman, A Adiguzel, T Adye, AA Affolder, Y Afik, MN Agaras, J Agarwala, A Aggarwal, C Agheorghiesei, F Ahmadov, WS Ahmed, S Ahuja, X Ai, G Aielli, A Aikot, M Ait Tamlihat, B Aitbenchikh, M Akbiyik, TPA Åkesson, AV Akimov, D Akiyama, NN Akolkar, S Aktas, K Al Khoury, GL Alberghi, J Albert, P Albicocco, GL Albouy, S Alderweireldt, ZL Alegria, M Aleksa, IN Aleksandrov, C Alexa, T Alexopoulos, F Alfonsi, M Algren, M Alhroob, B Ali, HMJ Ali, S Ali, SW Alibocus, M Aliev, G Alimonti, W Alkakhi, C Allaire, BMM Allbrooke, JS Allen, JF Allen, CA Allendes Flores, PP Allport, A Aloisio, F Alonso, C Alpigiani, ZMK Alsolami, M Alvarez Estevez, A Alvarez Fernandez, M Alves Cardoso, MG Alviggi, M Aly, Y Amaral Coutinho, A Ambler, C Amelung, M Amerl, CG Ames, D Amidei, B Amini, KJ Amirie, SP Amor Dos Santos, KR Amos, D Amperiadou, S An, V Ananiev, C Anastopoulos, T Andeen, JK Anders, AC Anderson, SY Andrean, A Andreazza, S Angelidakis, A Angerami, AV Anisenkov, A Annovi, C Antel, E Antipov, M Antonelli, F Anulli, M Aoki, T Aoki, MA Aparo, L Aperio Bella, C Appelt, A Apyan, SJ Arbiol Val, C Arcangeletti, ATH Arce, J-F Arguin, S Argyropoulos, J-H Arling, O Arnaez, H Arnold, G Artoni, H Asada, K Asai, S Asai, NA Asbah, RA Ashby Pickering, K Assamagan, R Astalos, KSV Astrand, S Atashi, RJ Atkin, M Atkinson, H Atmani, PA Atmasiddha, K Augsten, S Auricchio, AD Auriol, VA Austrup, G Avolio, K Axiotis, G Azuelos, D Babal, H Bachacou, K Bachas, A Bachiu, F Backman, A Badea, TM Baer, P Bagnaia, M Bahmani, D Bahner, K Bai, JT Baines, L Baines, OK Baker, E Bakos, D Bakshi Gupta, LE Balabram Filho, V Balakrishnan, R Balasubramanian, EM Baldin, P Balek, E Ballabene, F Balli, LM Baltes, WK Balunas, J Balz, I Bamwidhi, E Banas, M Bandieramonte, A Bandyopadhyay, S Bansal, L Barak, M Barakat, EL Barberio, D Barberis, M Barbero, MZ Barel, T Barillari, M-S Barisits, T Barklow, P Baron, DA Baron Moreno, A Baroncelli, AJ Barr, JD Barr, F Barreiro, J Barreiro Guimarães da Costa, U Barron, MG Barros Teixeira, S Barsov, F Bartels, R Bartoldus, AE Barton, P Bartos, A Basan, M Baselga, A Bassalat, MJ Basso, S Bataju, R Bate, RL Bates, S Batlamous, B Batool, M Battaglia, D Battulga, M Bauce, M Bauer, P Bauer, LT Bazzano Hurrell, JB Beacham, T Beau, JY Beaucamp, PH Beauchemin, P Bechtle, HP Beck, K Becker, AJ Beddall, VA Bednyakov, CP Bee, LJ Beemster, TA Beermann, M Begalli, M Begel, A Behera, JK Behr, JF Beirer, F Beisiegel, M Belfkir, G Bella, L Bellagamba, A Bellerive, P Bellos, K Beloborodov, D Benchekroun, F Bendebba, Y Benhammou, KC Benkendorfer, L Beresford, M Beretta, E Bergeaas Kuutmann, N Berger, B Bergmann, J Beringer, G Bernardi, C Bernius, FU Bernlochner, F Bernon, A Berrocal Guardia, T Berry, P Berta, A Berthold, S Bethke, A Betti, AJ Bevan, NK Bhalla, S Bhatta, DS Bhattacharya, P Bhattarai, KD Bhide, VS Bhopatkar, RM Bianchi, G Bianco, O Biebel, R Bielski, M Biglietti, CS Billingsley, Y Bimgdi, M Bindi, A Bingul, C Bini, GA Bird, M Birman, M Biros, S Biryukov, T Bisanz, E Bisceglie, JP Biswal, D Biswas, I Bloch, A Blue, U Blumenschein, J Blumenthal, VS Bobrovnikov, M Boehler, B Boehm, D Bogavac, AG Bogdanchikov, LS Boggia, C Bohm, V Boisvert, P Bokan, T Bold, M Bomben, M Bona, M Boonekamp, CD Booth, AG Borbély, IS Bordulev, G Borissov, D Bortoletto, D Boscherini, M Bosman, JD Bossio Sola, K Bouaouda, N Bouchhar, L Boudet, J Boudreau, EV Bouhova-Thacker, D Boumediene, R Bouquet, A Boveia, J Boyd, D Boye, IR Boyko, L Bozianu, J Bracinik, N Brahimi, G Brandt, O Brandt, F Braren, B Brau, JE Brau, R Brener, L Brenner, R Brenner, S Bressler, G Brianti, D Britton, D Britzger, I Brock, R Brock, G Brooijmans, EM Brooks, E Brost, LM Brown, LE Bruce, TL Bruckler, PA Bruckman de Renstrom, B Brüers, A Bruni, G Bruni, M Bruschi, N Bruscino, T 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Gongadze, F Gonnella, JL Gonski, RY González Andana, S González de la Hoz, R Gonzalez Lopez, C Gonzalez Renteria, MV Gonzalez Rodrigues, R Gonzalez Suarez, S Gonzalez-Sevilla, L Goossens, B Gorini, E Gorini, A Gorišek, TC Gosart, AT Goshaw, MI Gostkin, S Goswami, CA Gottardo, SA Gotz, M Gouighri, V Goumarre, AG Goussiou, N Govender, RP Grabarczyk, I Grabowska-Bold, K Graham, E Gramstad, S Grancagnolo, CM Grant, PM Gravila, FG Gravili, HM Gray, M Greco, MJ Green, C Grefe, AS Grefsrud, IM Gregor, KT Greif, P Grenier, SG Grewe, AA Grillo, K Grimm, S Grinstein, J-F Grivaz, E Gross, J Grosse-Knetter, L Guan, JGR Guerrero Rojas, G Guerrieri, R Gugel, JAM Guhit, A Guida, E Guilloton, S Guindon, F Guo, J Guo, L Guo, Y Guo, A Gupta, R Gupta, S Gurbuz, SS Gurdasani, G Gustavino, P Gutierrez, LF Gutierrez Zagazeta, M Gutsche, C Gutschow, C Gwenlan, CB Gwilliam, ES Haaland, A Haas, M Habedank, C Haber, HK Hadavand, A Hadef, S Hadzic, AI Hagan, JJ Hahn, EH Haines, M Haleem, J Haley, GD Hallewell, L 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Wenaus, B Wendland, T Wengler, NS Wenke, N Wermes, M Wessels, AM Wharton, AS White, A White, MJ White, D Whiteson, L Wickremasinghe, W Wiedenmann, M Wielers, C Wiglesworth, DJ Wilbern, HG Wilkens, JJH Wilkinson, DM Williams, HH Williams, S Williams, S Willocq, BJ Wilson, PJ Windischhofer, FI Winkel, F Winklmeier, BT Winter, JK Winter, M Wittgen, M Wobisch, T Wojtkowski, Z Wolffs, J Wollrath, MW Wolter, H Wolters, MC Wong, EL Woodward, SD Worm, BK Wosiek, KW Woźniak, S Wozniewski, K Wraight, C Wu, M Wu, M Wu, SL Wu, X Wu, Y Wu, Z Wu, J Wuerzinger, TR Wyatt, BM Wynne, S Xella, L Xia, M Xia, M Xie, S Xin, A Xiong, J Xiong, D Xu, H Xu, L Xu, R Xu, T Xu, Y Xu, Z Xu, Z Xu, B Yabsley, S Yacoob, Y Yamaguchi, E Yamashita, H Yamauchi, T Yamazaki, Y Yamazaki, S Yan, Z Yan, HJ Yang, HT Yang, S Yang, T Yang, X Yang, X Yang, Y Yang, Y Yang, Z Yang, W-M Yao, H Ye, H Ye, J Ye, S Ye, X Ye, Y Yeh, I Yeletskikh, B Yeo, MR Yexley, TP Yildirim, P Yin, K Yorita, S Younas, CJS Young, C Young, C Yu, Y Yu, J Yuan, M Yuan, R Yuan, L Yue, M Zaazoua, B Zabinski, E Zaid, ZK Zak, T Zakareishvili, S Zambito, JA Zamora Saa, J Zang, D Zanzi, O Zaplatilek, C Zeitnitz, H Zeng, JC Zeng, DT Zenger, O Zenin, T Ženiš, S Zenz, S Zerradi, D Zerwas, M Zhai, DF Zhang, J Zhang, J Zhang, K Zhang, L Zhang, L Zhang, P Zhang, R Zhang, S Zhang, S Zhang, T Zhang, X Zhang, X Zhang, Y Zhang, Y Zhang, Y Zhang, Z Zhang, Z Zhang, Z Zhang, H Zhao, T Zhao, Y Zhao, Z Zhao, Z Zhao, A Zhemchugov, J Zheng, K Zheng, X Zheng, Z Zheng, D Zhong, B Zhou, H Zhou, N Zhou, Y Zhou, Y Zhou, Y Zhou, CG Zhu, J Zhu, X Zhu, Y Zhu, Y Zhu, X Zhuang, K Zhukov, NI Zimine, J Zinsser, M Ziolkowski, L Živković, A Zoccoli, K Zoch, TG Zorbas, O Zormpa, W Zou, L ZwalinskiDesign production and testing of ATLAS ITk strip bus tapes
Journal of Instrumentation IOP Publishing 20:01 (2025) C01047
Abstract:
This paper reviews the bus tapes used for the barrel and end cap detectors for the ATLAS ITk strip detector. The long copper/polyimide tapes with narrow track and gap are very challenging to produce with an acceptable yield. Two different technologies for these tapes are compared. After several iterations, barrel and end cap tapes are in production at two different manufacturers. Results from the electrical and dimensional QC show that both approaches meet the tight specifications. Tests of the radiation tolerance are also discussed.Total Cost of Ownership and Evaluation of Google Cloud Resources for the ATLAS Experiment at the LHC
Computing and Software for Big Science Springer 9:1 (2025) 2
Authors:
G Aad, E Aakvaag, B Abbott, S Abdelhameed, K Abeling, NJ Abicht, SH Abidi, M Aboelela, A Aboulhorma, H Abramowicz, H Abreu, Y Abulaiti, BS Acharya, A Ackermann, C Adam Bourdarios, L Adamczyk, SV Addepalli, MJ Addison, J Adelman, A Adiguzel, T Adye, AA Affolder, Y Afik, MN AgarasAbstract:
The ATLAS Google Project was established as part of an ongoing evaluation of the use of commercial clouds by the ATLAS Collaboration, in anticipation of the potential future adoption of such resources by WLCG grid sites to fulfil or complement their computing pledges. Seamless integration of Google cloud resources into the worldwide ATLAS distributed computing infrastructure was achieved at large scale and for an extended period of time, and hence cloud resources are shown to be an effective mechanism to provide additional, flexible computing capacity to ATLAS. For the first time a total cost of ownership analysis has been performed, to identify the dominant cost drivers and explore effective mechanisms for cost control. Network usage significantly impacts the costs of certain ATLAS workflows, underscoring the importance of implementing such mechanisms. Resource bursting has been successfully demonstrated, whilst exposing the true cost of this type of activity. A follow-up to the project is underway to investigate methods for improving the integration of cloud resources in data-intensive distributed computing environments and reducing costs related to network connectivity, which represents the primary expense when extensively utilising cloud resources.Combination of searches for singly produced vectorlike top quarks in pp collisions at s=13 TeV with the ATLAS detector
Physical Review D American Physical Society (APS) 111:1 (2025) 012012