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Search for neutral long-lived particles in $pp$ collisions at $ \sqrt{s} $ = 13 TeV that decay into displaced hadronic jets in the ATLAS calorimeter
B. Abbott, D. C. Abbott, A. Abed Abud, K. Abeling, D. K. Abhayasinghe, S. H. Abidi, A. Aboulhorma, H. Abramowicz, H. Abreu, Y. Abulaiti, A. C. Abusleme Hoffman, B. S. Acharya, B. Achkar, L. Adámek, C. Adam Bourdarios, L. Adamczyk, S. V. Addepalli, J. Adelman, Adorni Braccesi Chiassi, Sofia, Adye, Tim, J. Agarwala, X. Ai, M. Akbiyik, Cervelli, Alberto, Alexopoulos, Theodoros, F. Alfonsi, S. Ali, A. Aloisio, M. Alvarez Estevez, Amelung, Christoph, K. R. Amos, V. Ananiev, S. Y. Andrean, E. Antipov, M. A. Aparo, J.-H. Arling, K. Asai, E. M. Asimakopoulou, Atkin, Ryan Justin, P. A. Atmasiddha, G. Avner, Bachiu, Alexander, A. Badea, Bakos, Evelin, R. Balasubramanian, E. Ballabene, L. M. Baltes, K. N. Barends, P. Baroň, F. Barreiro, S. Barsov, G. Bartolini, M. J. Basso, C. R. Basson, Batlamous, Souad, P. Bauer, A. Bayirli, T. Beau, F. Becherer, P. Bechtle, Beck, Hans Peter, F. Beisiegel, Beloborodov, Konstantin, Bentvelsen, Stan, D. Berge, P. Berta, S. Bhatta, M. Bindi, V. Bhopatkar, R. M. Bianchi, C. J. Birch-sykes, G. A. Bird, Bjoerke, Kristian, I. Bloch, Blumenschein, Ulla, J. Blumenthal, Bobrovnikov, Viktor, Boehler, Michael, C. D. Booth, A. G. Borbély, K. Bouaouda, Bouquet, Romain, Braren, Frued Erik, D. Britzger, B. Brüers, B. A. Bullard, J. C. Burzynski, E. L. Busch, H. Cai, S. Calvet, D. Camarero Munoz, Maria Teresa Camerlingo, G. Carducci, M. Carnesale, T. M. Carter, Casha, Albert Francis, E. G. Castiglia, F. L. Castillo, N. Cavalli, F. Celli, M. S. Centonze, Cerny, Karel, M. Chala, J. Chan, T. P. Charman, H. Chen, E. Cherepanova, Chomont, Arthur, K. M. Ciesla, L. Clissa, A. E. C. Coimbra, S. Coelli, Cohen, Hadar, Collot, Johann, E. I. Conroy, H. G. Cooke, B. M. Cote, F. Crescioli, M. Cristinziani, M. Cristoforetti, Croft, Vincent Alexander, Z. Cui, M. M. Czurylo, V. D’Amico, B. Davis-Purcell, De Jong, Paul, A. De Maria, De Salvo, Alessandro, Dedovich, Dmitri, J. Degens, F. Del Rio, Delsart, Pierre Antoine, Denisov, Serguei, Dette, Karola, C. Deutsch, Di Luca, Andrea, S. Díez Cornell, C. Diez Pardos, C. Dimitriadi, I-M. Dinu, C. Doglioni, A. S. Drobac, G. Duckeck, M. Dunford, S. Dungs, G. I. Dyckes, M. Dyndał, B. Dutta, Dwyer, Brianna, L. F. Ehrke, Ene, Irina, M. Errenst, M. O. Evans, S. Ezzarqtouni, V. Fadeyev, Falke, Peter Johannes, M. Faraj, G. Fedotov, Forti, Alessandra, D. E. Fellers, E. K. Filmer, M. Flores, J. H. Foo, L. Fountas, S. Francescato, L. Franco, A. C. Freegard, M. Fujimoto, G. E. Gallardo, Garcia-Sciveres, Maurice, R. B. Garg, S. J. Gasiorowski, Geanta, Andrei Alexandru, W. F. George, P. Gessinger-Befurt, A. Ghosal, D. T. Gil, L. Ginabat, C. Glasman, G. R. Gledhill, I. Gnesi, Y. Go, Golubkov, Dmitry, J. P. Gombas, S. González de la Hoz, Gonzalvo Rodriguez, Galo Rafael, Gonzalez, JS, Gorini, Benedetto, C. A. Gottardo, V. Goumarre, K. Graham, Groh, Sabrina, F. Guo, L. Guo, Gurbuz, Saime, M. Guth, M. Habedank, S. Hadzic, L. Halser, Y. F. Han, Hance, Mike, D. A. Hangal, M. D. Hank, D. Harada, Y. T. Harris, N. M. Hartman, Hartmann, Nikolai, S. Hayashida, D. Hayden, Y. Hernández Jiménez, Y. He, A. L. Heggelund, N. D. Hehir, W. D. Heidorn, B. Heinemann, Heinlein, James Geddy, Held, Alexander, S. Hellman, T. Herrmann, H. Hibi, D. Hirschbuehl, Hodkinson, Benjamin Haslum, D. Höhn, B. P. Honan, J. Hong, J. C. Honig, J. Hoya, M. Hrabovský, A. Hrynevich, Y. Huang, S. K. Huiberts, R. Hulsken, Ilg, Armin, H. Imam, Iodice, Mauro, Izen, Joseph Michael, P. Jackson, B. P. Jaeger, Jakel, Gunnar, Jamieson, Jonathan, K. W. Janas, A. E. Jaspan, Zihang Jia, S. Jiggins, E. Jones, X. Ju, Kahn, Abraham, N. Kakati, Kalderon, Will, D. Kar, K. Karava, I. Karkanias, E. Kasimi, K. Kawagoe, G. V. Kehris, Keller, John Stakely, K. E. Kennedy, M. Khandoga, Kilgallon, Aaron Joseph, E. Kim, P. Klimek, Kitsaki, Chara, M. Klassen, C. Klein, L. Klein, M. Klein, Klimpel, Fabian, T. M. Knight, M. Kolb, T. Komárek, Koperny, Stefan Zenon, Kordas, Kostas, S. Korn, B. Kortman, W. H. Kostecka, A. Kotsokechagia, R. Kowalewski, Kozhin, Anatoli, Kreul, Ken Matthias, S. Krishnamurthy, H. Krüger, A. Kubota, O. Kuchinskaia, T. Kuhl, N. Kumari, O. Kuprash, K. W. Kwok, I. K. Lakomiec, N. Lalloue, J. E. Lambert, C. Lampoudis, E. Lançon, Lang, Valerie, Lellouch, J, A. Lapertosa, V. Latoňová, Lau, Tak Shun, Z. Lawrence, B. Leban, M. LeBlanc, Lisboa Leite, Marco, L. L. Leeuw, H. P. Lefebvre, L. Li, R. Leitner, K. J. C. Leney, T. Lenz, Leone, Sandra, C. Leonidopoulos, M. A. L. Leite, C. G. Lester, M. Levchenko, J. Levêque, D. Levin, Lieber Marin, Juan, Z. Li, M. Liberatore, Bo 博 Liu 刘, Liu, Bingxuan, Danning Liu, Mingyi Liu, I. López Paz, Livan, Michele, X. Lou, G. Lu, M. Lu, Lu, Sicong, Y. J. Lu, A. Lucotte, F. Luehring, I. Luise, Lyu, Feng, Ma, Lianliang, D. M. Mac Donell, J. C. MacDonald, Mader, Wolfgang, Magro, Jacopo, Y. Makida, D. Malito, J. P. Mandalia, Manisha, Manisha, D. C. Mankad, P. Martinez Agullo, S. Martin–Haugh, L. Marcoccia, M. Marinescu, T. Mathisen, M. Mazza, C. Mc Ginn, J. P. Mc Gowan, Mcfayden, Josh, Melo, Andres Hugo, J. K. R. Meshreki, Middleton, Robin, L. S. Miller, Milstead, David Anthony, O. Miu, S. Möbius, P. Moder, Mondal, Buddhadeb, S. Mondal, Monticelli, Fernando, T. Moskalets, Moss, Joshua, M. Murin, J. M. Muse, A. Nag, G. Navarro, R. Nayak, K. Nelson, F. Neuhaus, J. Neundorf, R. Newhouse, T. Nobe, M. Niemeyer, D. L. Noel, S. A. Olivares Pino, M. B. Norfolk, R. R. B. Norisam, Oakham, Gerald, R. Oishi, Ö. O. Öncel, A. P. O’Neill, P. S. Ott, G. J. Ottino, Owen, Mark Andrew, Oyulmaz, Kaan Yuksel, L. Pascual Dominguez, A. P. Pereira Peixoto, F. Pasquali, Pasuwan, Patrawan, J. Pearkes, M. Penzin, A. Perrevoort, O. Perrin, Petersen, Brian, V. Petousis, G. Pezzullo, F. Piazza, D. A. Pizzi, Pizzini, Alessio, G. Poddar, Pottgen, Ruth, S. Polacek, P. Postolache, G. Rabanal Bolanos, P. Pralavorio, M. M. Prapa, G. Proto, D. Pudzha, D. Pyatiizbyantseva, Qin, Quake, D. Rafanoharana, Rajagopalan, Srini, V. Raskina, Read, Alexander Lincoln, Rembser, Christoph, G. Ripellino, M. Ressegotti, P. Riedler, Rimoldi, Marco, B. A. Roberts, S. H. Robertson, J. Roggel, Romero, Anabel, Rosati, Stefano, Rossi, Elvira, Rossi, Leonardo, G. Rovelli, Safai Tehrani, Francesco, A. J. Ruby, T. A. Ruggeri, Frederik Ruehr, Rybacki, Katherine Amy, E. B. Rye, L. Sabetta, M. Safdari, D. P. C. Sankey, Sampsonidis, Dimos, C. O. Sander, Izaac Sanderswood, J. A. Sandesara, K. A. Saoucha, Sasaki, Osamu, Sauer, Christof, Sauvan, Emmanuel, Chtcheguelski, Valery, C. Scheulen, P. G. Scholer, Sebastiani, Cristiano, K. Sedlaczek, B. D. Seidlitz, Claudia Seitz, L. Selem, V. Senthilkumar, Serkin, Leonid, Sfyrla, Anna, R. Shaheen, S. Sharma, Shaw, Kate, Shrestha, Suyog, M. J. Shroff, F. Siegert, F. Sili, J. M. Silva, Silverstein, Samuel, E. L. Simpson, Sindhu, Sreelakshmi, Singh, Sundeep, Sinha, Supriya, Siral, Ismet, Smirnov, Serge, Smith, Emily Ann, Smith, Hayden Alexander, S. Solomon, Son, Hyungsuk, A. Sonay, Stevenson, Thomas James, Z. Soumaimi, S. Spinali, A. Stampekis, M. Standke, M. M. Stanitzki, Starchenko, Jenya, G. H. Stark, Stavropoulos, George, Strandberg, Sara, Strom, David, L. R. Strom, N. A. Styles, D. Su, S. Su, X. Su, K. Sugizaki, L. Sultanaliyeva, T. Swirski, T. Sýkora, D. Ta, K. Tackmann, R. H. M. Taibah, E. A. Thompson, K. C. Tam, Tamir, Nadav Michael, A. Tanaka, Z. Tao, Tartarelli, Francesco, N. Themistokleous, Y. Tian, Tikhonov, Iouri, S. H. Tlou, Y. Tu, Tokar, Stano, R. Tombs, L. Tompkins, M. Toscani, F. Tsai, Tsai, Meng-Ju, A. Tsiamis, V. Tsiskaridze, Y. Tsujikawa, Tzanis, Polyneikis, E. Tzovara, Mesut Unal, A. Undrus, P. Urquijo, Vafeiadis, Theodoros, Valdes Santurio, Eduardo, S. Van Stroud, M. Vandenbroucke, Van De Wall, Evan Richard, D. Vannicola, L. Vannoli, Vasile, Matei, M. Vessella, Vesterbacka, Leonora, Vickey, Trevor, E. Voevodina, J. Von Ahnen, M. Vos, N. K. Vu, O. Vujinovic, S. Wada, M. Wakida, Walder, James William, Wang, Alex Zeng, Wang, Wenxiao, Wieseotte, Natalie, S. M. Weber, Wengler, Thorsten, Wenaus, Torre, Wielers, Monika, Wiglesworth, Craig, P. J. Windischhofer, Williams, Daniel, D. M. Williams, S. Willocq, A. F. Wongel, S. D. Worm, Wu, Yusheng, J. Xiang, Xingfei Xie, Xu, Riley, L. Xu, Z. Xu, B. Yabsley, Yamaguchi, Naoki, H. Yamauchi, T. Yang, H. Ye, J. Ye, M. R. Yexley, P. Yin, Young, Charlie, Zaid, Estifa'A, D. T. Zenger, D. Zerwas, Lei Zhang, Rui 蕊 Zhang 张, S. Zhang, X. Zhang, Y. Zhao, Z. Zhao, A. Zhemchugov, Z. Zheng, D. Zhong, Bing Zhou, Chengguang Zhu, C. Zhu, Zhu, Heling, Y. C. Zhu, X. Zhuang, Zhukov, Konstantin, V. Zhulanov, D. Ziemińska, N. I. Zimine, S. Zimmermann, J. Zinsser, Michał Ziółkowski, L. Živković, A. Zoccoli, Zorbas, Theodore, O. Zormpa, W. Zou, L. Zwalinski
Bibliographic record
VenueDESY Publication Database (PUBDB) (Deutsches Elektronen-Synchrotron) · 2022
Typearticle
Languageen
FieldPhysics and Astronomy
TopicParticle physics theoretical and experimental studies
Canadian institutionsnot available
FundersH2020 Marie Skłodowska-Curie ActionsRoyal SocietyCentre National pour la Recherche Scientifique et TechniqueEuropean Social FundEuropean Regional Development FundMax-Planck-GesellschaftCentre National de la Recherche ScientifiqueBritish Columbia Knowledge Development FundFundação para a Ciência e a TecnologiaInstitut National de Physique Nucléaire et de Physique des ParticulesAgencia Nacional de Promoción Científica y TecnológicaSchweizerischer Nationalfonds zur Förderung der Wissenschaftlichen ForschungScience and Technology Facilities CouncilBundesministerium für Bildung und ForschungMinistry of Education, Culture, Sports, Science and TechnologyNatural Sciences and Engineering Research Council of CanadaNarodowa Agencja Wymiany AkademickiejJapan Society for the Promotion of ScienceNational Research Center "Kurchatov Institute"Israel Science FoundationTürkiye Atom Enerjisi KurumuJoint Institute for Nuclear ResearchConselho Nacional de Desenvolvimento Científico e TecnológicoBundesministerium für Wissenschaft, Forschung und WirtschaftGeneralitat de CatalunyaGeneralitat ValencianaAustrian Science FundU.S. Department of EnergyNational Natural Science Foundation of ChinaLeverhulme TrustEuropean CommissionFundação de Amparo à Pesquisa do Estado de São PauloJavna Agencija za Raziskovalno Dejavnost RSDeutsche ForschungsgemeinschaftNederlandse Organisatie voor Wetenschappelijk OnderzoekAgence Nationale de la RechercheNational Science FoundationAlexander von Humboldt-StiftungTRIUMFCompute CanadaAgencia Nacional de Investigación y DesarrolloServices Fédéraux des Affaires Scientifiques, Techniques et CulturellesMinisterstvo Školství, Mládeže a TělovýchovyCanarieCentres de Recerca de CatalunyaCERNDanmarks GrundforskningsfondMinisterio de Ciencia e Innovación
KeywordsPhysicsHadronAtlas (anatomy)Particle physicsNuclear physicsCalorimeter (particle physics)Large Hadron ColliderBiologyDetector
Abstract
A search for decays of pair-produced neutral long-lived particles (LLPs) is presented using 139 fb$^{-1}$ of proton-proton collision data collected by the ATLAS detector at the LHC in 2015-2018 at a centre-of-mass energy of 13 TeV. Dedicated techniques were developed for the reconstruction of displaced jets produced by LLPs decaying hadronically in the ATLAS hadronic calorimeter. Two search regions are defined for different LLP kinematic regimes. The observed numbers of events are consistent with the expected background, and limits for several benchmark signals are determined. For a SM Higgs boson with a mass of 125 GeV, branching ratios above 10% are excluded at 95% confidence level for values of $c$ times LLP mean proper lifetime in the range between 20 mm and 10 m depending on the model. Upper limits are also set on the cross-section times branching ratio for scalars with a mass of 60 GeV and for masses between 200 GeV and 1 TeV.
Fetched live from OpenAlex and de-inverted. Abstracts are not stored in this database: the inverted indexes are 8.6 GB of the frame’s 9.3 GB of text, and the host has 13 GB free.
How this classification was reachedexpand
Full frame machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
metaresearch head score (Codex)0.001
metaresearch head score (Gemma)0.001
Version: metacan-v3-hybrid-931329e0061cValidation status: machine_predicted_unvalidated
Candidate categoriesnone
Consensus categoriesnone
DomainCandidate signal: none · Consensus signal: none
Study designCandidate signal: Observational · Consensus signal: Observational
GenreCandidate signal: Empirical · Consensus signal: Empirical
Teacher disagreement score0.002
Threshold uncertainty score0.007
Distilled classifier scores by category (both heads)
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.001 | 0.001 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.001 | 0.000 |
| Bibliometrics | 0.001 | 0.002 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.001 | 0.000 |
| Open science | 0.001 | 0.001 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.002 | 0.001 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
Opus teacher head0.040
GPT teacher head0.302
Teacher spread0.263 · how far apart the two teachers sit on this one work
Validation status
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one source (direct Gemma or distilled Codex), not a consensus.
The models applied no category: nothing in the taxonomy fit this work.
Study designObservational
Domainnot available
GenreEmpirical
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".
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Citations0
Published2022
Admission routes1
Has abstractyes