Search for new physics in final states with semi-visible jets or anomalous signatures using the ATLAS detector
ArXiv 2505.01634 (2025)
Observation of VVZ production at s = 13 TeV with the ATLAS detector
Physics Letters B (2025) 139527
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 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, PP Allport, A Aloisio, F Alonso, C Alpigiani, ZMK Alsolami, 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, K Amirie, A Amirkhanov, SP Amor Dos Santos, KR Amos, D Amperiadou, S An, V Ananiev, C Anastopoulos, T Andeen, JK Anders, AC Anderson, 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, AM Aslam, K Assamagan, R Astalos, KSV Astrand, S Atashi, RJ Atkin, H Atmani, PA Atmasiddha, K Augsten, AD Auriol, VA Austrup, G Avolio, K Axiotis, G Azuelos, D Babal, H Bachacou, K Bachas, A Bachiu, E Bachmann, MJ Backes, 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, MG Barros Teixeira, S Barsov, F Bartels, R Bartoldus, AE Barton, P Bartos, A Basan, M Baselga, S Bashiri, A Bassalat, MJ Basso, S Bataju, R Bate, RL Bates, S Batlamous, M Battaglia, D Battulga, M Bauce, M Bauer, P Bauer, LT Bayer, 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, M Begalli, M Begel, 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, R Bertrand, S Bethke, A Betti, AJ Bevan, L Bezio, NK Bhalla, S Bharthuar, S Bhatta, DS Bhattacharya, P Bhattarai, ZM Bhatti, KD Bhide, VS Bhopatkar, RM Bianchi, G Bianco, O Biebel, M Biglietti, CS Billingsley, Y Bimgdi, M Bindi, A Bingham, 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, V Boisvert, P Bokan, T Bold, M Bomben, M Bona, M Boonekamp, AG Borbély, IS Bordulev, G Borissov, D Bortoletto, D Boscherini, M Bosman, 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, B Brau, JE Brau, R Brener, L Brenner, R Brenner, S Bressler, G Brianti, D Britton, D Britzger, I Brock, R Brock, G Brooijmans, AJ Brooks, EM Brooks, E Brost, LM Brown, LE Bruce, TL Bruckler, PA Bruckman de Renstrom, B Brüers, A Bruni, G Bruni, D Brunner, M Bruschi, N Bruscino, T Buanes, Q Buat, D Buchin, AG Buckley, O Bulekov, BA Bullard, S Burdin, CD Burgard, AM Burger, B Burghgrave, O Burlayenko, J Burleson, JTP Burr, JC Burzynski, EL Busch, V Büscher, PJ Bussey, JM Butler, CM Buttar, JM Butterworth, W Buttinger, CJ Buxo Vazquez, AR Buzykaev, S Cabrera Urbán, L Cadamuro, D Caforio, H Cai, Y Cai, Y Cai, VMM Cairo, O Cakir, N Calace, P Calafiura, G Calderini, P Calfayan, G Callea, LP Caloba, D Calvet, S Calvet, R Camacho Toro, S Camarda, D Camarero Munoz, P Camarri, MT Camerlingo, D Cameron, C Camincher, M Campanelli, A Camplani, V Canale, AC Canbay, E Canonero, J Cantero, Y Cao, F Capocasa, M Capua, A Carbone, R Cardarelli, JCJ Cardenas, MP Cardiff, G Carducci, T Carli, G Carlino, JI Carlotto, BT Carlson, EM Carlson, J Carmignani, L Carminati, A Carnelli, M Carnesale, S Caron, E Carquin, IB Carr, S Carrá, G Carratta, AM Carroll, MP Casado, M Caspar, FL Castillo, L Castillo Garcia, V Castillo Gimenez, NF Castro, A Catinaccio, JR Catmore, T Cavaliere, V Cavaliere, LJ Caviedes Betancourt, YC Cekmecelioglu, E Celebi, S Cella, V Cepaitis, K Cerny, AS Cerqueira, A Cerri, L Cerrito, F Cerutti, B Cervato, A Cervelli, G Cesarini, SA Cetin, PM Chabrillat, J Chan, WY Chan, JD Chapman, E Chapon, B Chargeishvili, DG Charlton, C Chauhan, Y Che, S Chekanov, SV Chekulaev, GA Chelkov, B Chen, B Chen, H Chen, H Chen, J Chen, J Chen, M Chen, S Chen, SJ Chen, X Chen, X Chen, CL Cheng, HC Cheng, S Cheong, A Cheplakov, E Cheremushkina, E Cherepanova, R Cherkaoui El Moursli, E Cheu, K Cheung, L Chevalier, V Chiarella, G Chiarelli, N Chiedde, G Chiodini, AS Chisholm, A Chitan, M Chitishvili, MV Chizhov, K Choi, Y Chou, EYS Chow, KL Chu, MC Chu, X Chu, Z Chubinidze, J Chudoba, JJ Chwastowski, D Cieri, KM Ciesla, V Cindro, A Ciocio, F Cirotto, ZH Citron, M Citterio, DA Ciubotaru, A Clark, PJ Clark, N Clarke Hall, C Clarry, SE Clawson, C Clement, Y Coadou, M Cobal, A Coccaro, RF Coelho Barrue, R Coelho Lopes De, S Coelli, LS Colangeli, B Cole, P Collado Soto, J Collot, P Conde Muiño, MP Connell, SH Connell, EI Conroy, F Conventi, HG Cooke, AM Cooper-Sarkar, FA Corchia, A Cordeiro Oudot Choi, LD Corpe, M Corradi, F Corriveau, A Cortes-Gonzalez, MJ Costa, F Costanza, D Costanzo, BM Cote, J Couthures, G Cowan, K Cranmer, L Cremer, D Cremonini, S Crépé-Renaudin, F Crescioli, M Cristinziani, M Cristoforetti, V Croft, JE Crosby, G Crosetti, A Cueto, H Cui, Z Cui, WR Cunningham, F Curcio, JR Curran, P Czodrowski, MJ Da Cunha Sargedas De Sousa, JV Da Fonseca Pinto, C Da Via, W Dabrowski, T Dado, S Dahbi, T Dai, D Dal Santo, C Dallapiccola, M Dam, G D'amen, V D'Amico, J Damp, JR Dandoy, D Dannheim, M Danninger, V Dao, G Darbo, SJ Das, F Dattola, S D'Auria, A D'Avanzo, T Davidek, I Dawson, HA Day-hall, K De, C De Almeida Rossi, R De Asmundis, N De Biase, S De Castro, N De Groot, P de Jong, H De la Torre, A De Maria, A De Salvo, U De Sanctis, F De Santis, A De Santo, JB De Vivie De Regie, J Debevc, DV Dedovich, J Degens, AM Deiana, J Del Peso, L Delagrange, F Deliot, CM Delitzsch, M Della Pietra, D Della Volpe, A Dell'Acqua, L Dell'Asta, M Delmastro, CC Delogu, PA Delsart, S Demers, M Demichev, SP Denisov, H Denizli, L D'Eramo, D Derendarz, F Derue, P Dervan, K Desch, C Deutsch, FA Di Bello, A Di Ciaccio, L Di Ciaccio, A Di Domenico, C Di Donato, A Di Girolamo, G Di Gregorio, A Di Luca, B Di Micco, R Di Nardo, KF Di Petrillo, M Diamantopoulou, FA Dias, T Dias Do Vale, MA Diaz, AR Didenko, M Didenko, EB Diehl, S Díez Cornell, C Diez Pardos, C Dimitriadi, A Dimitrievska, A Dimri, J Dingfelder, T Dingley, I-M Dinu, SJ Dittmeier, F Dittus, M Divisek, B Dixit, F Djama, T Djobava, C Doglioni, A Dohnalova, Z Dolezal, K Domijan, KM Dona, M Donadelli, B Dong, J Donini, A D'Onofrio, M D'Onofrio, J Dopke, A Doria, N Dos Santos Fernandes, P Dougan, MT Dova, AT Doyle, MA Draguet, MP Drescher, E Dreyer, I Drivas-koulouris, M Drnevich, M Drozdova, D Du, TA du Pree, F Dubinin, M Dubovsky, E Duchovni, G Duckeck, PK Duckett, OA Ducu, D Duda, A Dudarev, ER Duden, M D'uffizi, L Duflot, M Dührssen, I Duminica, AE 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Malyukov, J Mamuzic, G Mancini, MN Mancini, G Manco, JP Mandalia, SS Mandarry, I Mandić, L Manhaes de Andrade Filho, IM Maniatis, J Manjarres Ramos, DC Mankad, A Mann, S Manzoni, L Mao, X Mapekula, A Marantis, G Marchiori, M Marcisovsky, C Marcon, M Marinescu, S Marium, M Marjanovic, A Markhoos, M Markovitch, MK Maroun, EJ Marshall, Z Marshall, S Marti-Garcia, J Martin, TA Martin, VJ Martin, B Martin dit Latour, L Martinelli, M Martinez, P Martinez Agullo, VI Martinez Outschoorn, P Martinez Suarez, S Martin-Haugh, G Martinovicova, VS Martoiu, AC Martyniuk, A Marzin, D Mascione, L Masetti, J Masik, AL Maslennikov, SL Mason, P Massarotti, P Mastrandrea, A Mastroberardino, T Masubuchi, TT Mathew, J Matousek, DM Mattern, J Maurer, T Maurin, AJ Maury, B Maček, DA Maximov, AE May, E Mayer, R Mazini, I Maznas, M Mazza, SM Mazza, E Mazzeo, JP Mc Gowan, SP Mc Kee, CA Mc Lean, CC McCracken, EF McDonald, AE McDougall, LF Mcelhinney, JA Mcfayden, RP McGovern, RP Mckenzie, TC Mclachlan, DJ Mclaughlin, SJ McMahon, CM Mcpartland, RA McPherson, S Mehlhase, A Mehta, D Melini, BR Mellado Garcia, AH Melo, F Meloni, AM Mendes Jacques Da Costa, HY Meng, L Meng, S Menke, M Mentink, E Meoni, G Mercado, S Merianos, C Merlassino, C Meroni, J Metcalfe, AS Mete, E Meuser, C Meyer, J-P Meyer, RP Middleton, L Mijović, G Mikenberg, M Mikestikova, M Mikuž, H Mildner, A Milic, DW Miller, EH Miller, LS Miller, A Milov, DA Milstead, T Min, AA Minaenko, IA Minashvili, AI Mincer, B Mindur, M Mineev, Y Mino, LM Mir, M Miralles Lopez, M Mironova, MC Missio, A Mitra, VA Mitsou, Y Mitsumori, O Miu, PS Miyagawa, T Mkrtchyan, M Mlinarevic, T Mlinarevic, M Mlynarikova, S Mobius, P Mogg, MH Mohamed Farook, AF Mohammed, S Mohapatra, S Mohiuddin, G Mokgatitswane, L Moleri, B Mondal, S Mondal, K Mönig, E Monnier, L Monsonis Romero, J Montejo Berlingen, A Montella, M Montella, F Montereali, F Monticelli, S Monzani, A Morancho Tarda, N Morange, AL Moreira De Carvalho, M Moreno Llácer, C Moreno Martinez, JM 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A Sciandra, G Sciolla, F Scuri, CD Sebastiani, K Sedlaczek, SC Seidel, A Seiden, BD Seidlitz, C Seitz, JM Seixas, G Sekhniaidze, L Selem, N Semprini-Cesari, A Semushin, D Sengupta, V Senthilkumar, L Serin, M Sessa, H Severini, F Sforza, A Sfyrla, Q Sha, E Shabalina, H Shaddix, AH Shah, R Shaheen, JD Shahinian, D Shaked Renous, M Shamim, LY Shan, M Shapiro, A Sharma, AS Sharma, P Sharma, PB Shatalov, K Shaw, SM Shaw, Q Shen, DJ Sheppard, P Sherwood, L Shi, X Shi, S Shimizu, CO Shimmin, IPJ Shipsey, S Shirabe, M Shiyakova, MJ Shochet, DR Shope, B Shrestha, S Shrestha, I Shreyber, MJ Shroff, P Sicho, AM Sickles, E Sideras Haddad, AC Sidley, A Sidoti, F Siegert, Dj Sijacki, F Sili, JM Silva, I Silva Ferreira, MV Silva Oliveira, SB Silverstein, S Simion, R Simoniello, EL Simpson, H Simpson, LR Simpson, S Simsek, S Sindhu, P Sinervo, SN Singh, S Singh, S Sinha, S Sinha, M Sioli, K Sioulas, I Siral, E Sitnikova, J Sjölin, A Skaf, E Skorda, P Skubic, M Slawinska, I Slazyk, V Smakhtin, BH Smart, S Yu Smirnov, Y Smirnov, LN Smirnova, O Smirnova, AC Smith, DR Smith, EA Smith, JL Smith, MB Smith, R Smith, H Smitmanns, M Smizanska, K Smolek, AA Snesarev, HL Snoek, S Snyder, R Sobie, A Soffer, CA Solans Sanchez, E Yu Soldatov, U Soldevila, AA Solodkov, S Solomon, A Soloshenko, K Solovieva, OV Solovyanov, P Sommer, A Sonay, WY Song, A Sopczak, AL Sopio, F Sopkova, JD Sorenson, IR Sotarriva Alvarez, V Sothilingam, OJ Soto Sandoval, S Sottocornola, R Soualah, Z Soumaimi, D South, N Soybelman, S Spagnolo, M Spalla, D Sperlich, B Spisso, DP Spiteri, M Spousta, EJ Staats, R Stamen, E Stanecka, W Stanek-Maslouska, MV Stange, B Stanislaus, MM Stanitzki, B Stapf, EA Starchenko, GH Stark, J Stark, P Staroba, P Starovoitov, R Staszewski, G Stavropoulos, A Stefl, P Steinberg, B Stelzer, HJ Stelzer, O Stelzer-Chilton, H Stenzel, TJ Stevenson, GA Stewart, JR Stewart, MC Stockton, G Stoicea, M Stolarski, S Stonjek, A Straessner, J Strandberg, S Strandberg, M Stratmann, M Strauss, T 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Timoshyn, EXL Ting, P Tipton, A Tishelman-Charny, SH Tlou, K Todome, S Todorova-Nova, S Todt, L Toffolin, M Togawa, J Tojo, S Tokár, O Toldaiev, G Tolkachev, M Tomoto, L Tompkins, E Torrence, H Torres, E Torró Pastor, M Toscani, C Tosciri, M Tost, DR Tovey, T Trefzger, PM Tricarico, A Tricoli, IM Trigger, S Trincaz-Duvoid, DA Trischuk, A Tropina, L Truong, M Trzebinski, A Trzupek, F Tsai, M Tsai, A Tsiamis, PV Tsiareshka, S Tsigaridas, A Tsirigotis, V Tsiskaridze, EG Tskhadadze, M Tsopoulou, Y Tsujikawa, II Tsukerman, V Tsulaia, S Tsuno, K Tsuri, D Tsybychev, Y Tu, A Tudorache, V Tudorache, S Turchikhin, I Turk Cakir, R Turra, T Turtuvshin, PM Tuts, S Tzamarias, E Tzovara, F Ukegawa, PA Ulloa Poblete, EN Umaka, G Unal, A Undrus, G Unel, J Urban, P Urrejola, G Usai, R Ushioda, M Usman, F Ustuner, Z Uysal, V Vacek, B Vachon, T Vafeiadis, A Vaitkus, C Valderanis, E Valdes Santurio, M Valente, S Valentinetti, A Valero, E Valiente Moreno, A Vallier, JA Valls Ferrer, DR Van Arneman, TR Van 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Woodward, SD Worm, BK Wosiek, KW Woźniak, S Wozniewski, K Wraight, C Wu, M Wu, M Wu, SL Wu, S Wu, X Wu, X Wu, Y Wu, Z Wu, J Wuerzinger, TR Wyatt, BM Wynne, S Xella, L Xia, M Xia, M Xie, 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, W-M Yao, CL Yardley, 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, ND Young, Y Yu, J Yuan, M Yuan, R Yuan, L Yue, M Zaazoua, B Zabinski, I Zahir, ZK Zak, T Zakareishvili, S Zambito, JA Zamora Saa, J Zang, D Zanzi, R Zanzottera, 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, T Zhang, X Zhang, Y 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 ZwalinskiAn implementation of neural simulation-based inference for parameter estimation in ATLAS.
Reports on progress in physics. Physical Society (Great Britain) 88:6 (2025)
Abstract:
Neural simulation-based inference (NSBI) is a powerful class of machine-learning-based methods for statistical inference that naturally handles high-dimensional parameter estimation without the need to bin data into low-dimensional summary histograms. Such methods are promising for a range of measurements, including at the Large Hadron Collider, where no single observable may be optimal to scan over the entire theoretical phase space under consideration, or where binning data into histograms could result in a loss of sensitivity. This work develops a NSBI framework for statistical inference, using neural networks to estimate probability density ratios, which enables the application to a full-scale analysis. It incorporates a large number of systematic uncertainties, quantifies the uncertainty due to the finite number of events in training samples, develops a method to construct confidence intervals, and demonstrates a series of intermediate diagnostic checks that can be performed to validate the robustness of the method. As an example, the power and feasibility of the method are assessed on simulated data for a simplified version of an off-shell Higgs boson couplings measurement in the four-lepton final states. This approach represents an extension to the standard statistical methodology used by the experiments at the Large Hadron Collider, and can benefit many physics analyses.Measurement of off-shell Higgs boson production in theH∗→ZZ→4ℓdecay channel using a neural simulation-based inference technique in 13 TeV<i>pp</i>collisions with the ATLAS detector.
Reports on progress in physics. Physical Society (Great Britain) 88:5 (2025)
Abstract:
A measurement of off-shell Higgs boson production in theH∗→ZZ→4ℓdecay channel is presented. The measurement uses 140 fb-1of proton-proton collisions ats=13TeV collected by the ATLAS detector at the Large Hadron Collider and supersedes the previous result in this decay channel using the same dataset. The data analysis is performed using a neural simulation-based inference method, which builds per-event likelihood ratios using neural networks. The observed (expected) off-shell Higgs boson production signal strength in theZZ→4ℓdecay channel at 68% CL is0.87-0.54+0.75(1.00-0.95+1.04). The evidence for off-shell Higgs boson production using theZZ→4ℓdecay channel has an observed (expected) significance of 2.5σ(1.3σ). The expected result represents a significant improvement relative to that of the previous analysis of the same dataset, which obtained an expected significance of 0.5σ. When combined with the most recent ATLAS measurement in theZZ→2ℓ2νdecay channel, the evidence for off-shell Higgs boson production has an observed (expected) significance of 3.7σ(2.4σ). The off-shell measurements are combined with the measurement of on-shell Higgs boson production to obtain constraints on the Higgs boson total width. The observed (expected) value of the Higgs boson width at 68% CL is4.3-1.9+2.7(4.1-3.4+3.5) MeV.Measurement of the top quark mass with the ATLAS detector using t t ¯ events with a high transverse momentum top quark
Physics Letters B Elsevier (2025) 139608