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Machine-learning techniques for model-independent searches in dijet final states

Hayrapetyan, Aram [Yerevan Phys. Inst.]·Makarenko, Vladimir [Yerevan Phys. Inst.] (ORCID:0000000284068605)·Tumasyan, Armen [Yerevan Phys. Inst.] (ORCID:0009000006846742)·Adam, Wolfgang [Vienna, OAW] (ORCID:0000000190994341)·Benato, Lisa [Vienna, OAW] (ORCID:0000000151357489)·Bergauer, Thomas [Vienna, OAW] (ORCID:0000000257860293)·Dragicevic, Marko [Vienna, OAW] (ORCID:0000000319676783)·Giordano, Cristina [Vienna, OAW]·Hussain, Priya Sajid [Vienna, OAW] (ORCID:0000000248255278)·Jeitler, Manfred [Vienna, OAW; TU Vienna] (ORCID:0000000251419560)·Krammer, Natascha [Vienna, OAW] (ORCID:0000000205480985)·Li, Ang [Vienna, OAW] (ORCID:000000024547116X)·Liko, Dietrich [Vienna, OAW] (ORCID:000000023380473X)·Matthewman, Mark [Vienna, OAW]·Schieck, Jochen [Vienna, OAW; TU Vienna] (ORCID:0000000210588093)·Schöfbeck, Robert [Vienna, OAW; TU Vienna] (ORCID:0000000223328784)·Shooshtari, Maryam [Vienna, OAW] (ORCID:0009000488824887)·Sonawane, Mangesh [Vienna, OAW] (ORCID:0000000305107010)·Waltenberger, Wolfgang [Vienna, OAW] (ORCID:0000000262157228)·Wulz, Claudia-Elisabeth [Vienna, OAW; TU Vienna] (ORCID:0000000192265812)·Janssen, Tahys [Antwerp U.] (ORCID:0000000239984081)·Kwon, Hyejin [Antwerp U.] (ORCID:0009000251655018)·Ocampo Henao, Daniel [Antwerp U.] (ORCID:0000000197593452)·Van Laer, Thomas [Antwerp U.] (ORCID:0000000177762108)·Van Mechelen, Pierre [Antwerp U.] (ORCID:0000000287319051)·Bierkens, Jas [Vrije U., Brussels] (ORCID:0000000208753977)·Breugelmans, Nordin [Vrije U., Brussels]·D'Hondt, Jorgen [Vrije U., Brussels] (ORCID:0000000295986241)·Dansana, Soumya [Vrije U., Brussels] (ORCID:0000000277527471)·De Moor, Alexandre [Vrije U., Brussels] (ORCID:0000000159641935)·Delcourt, Martin [Vrije U., Brussels] (ORCID:0000000182061787)·Heyen, Felix [Vrije U., Brussels]·Hong, Yanwen [Vrije U., Brussels] (ORCID:0000000347522458)·Kashko, Pavlo [Vrije U., Brussels] (ORCID:0000000270507152)·Lowette, Steven [Vrije U., Brussels] (ORCID:0000000339849987)·Makarenko, Inna [Vrije U., Brussels] (ORCID:0000000285534508)·Müller, Denise [Vrije U., Brussels] (ORCID:0000000217524527)·Song, Juhee [Vrije U., Brussels] (ORCID:0000000327315881)·Tavernier, Stefaan [Vrije U., Brussels] (ORCID:0000000267929522)·Tytgat, Michael [Vrije U., Brussels; Gent U.] (ORCID:0000000239902074)·Van Onsem, Gerrit Patrick [Vrije U., Brussels] (ORCID:0000000216642337)·Van Putte, Senne [Vrije U., Brussels] (ORCID:0000000315593606)·Vannerom, David [Vrije U., Brussels] (ORCID:0000000227475095)·Bilin, Bugra [Brussels U.] (ORCID:0000000314397128)·Clerbaux, Barbara [Brussels U.] (ORCID:0000000185478211)·Das, Aloke Kumar [Brussels U.]·De Bruyn, Isabelle [Brussels U.] (ORCID:0000000317044360)·De Lentdecker, Gilles [Brussels U.] (ORCID:0000000151247693)·Evard, Hugues [Brussels U.] (ORCID:0009000550391462)·Favart, Laurent [Brussels U.] (ORCID:0000000316457454)·Gianneios, Paraskevas [Brussels U.] (ORCID:0009000372330738)·Khalilzadeh, Ali [Brussels U.]·Khan, Fakhri Alam [Brussels U.] (ORCID:000900022039277X)·Malara, Andrea [Brussels U.] (ORCID:0000000186459282)·Shahzad, Muhammad Aamir [Brussels U.]·Sharma, Archana [Brussels U.] (ORCID:0000000298601650)·Thomas, Laurent [Brussels U.] (ORCID:0000000227563853)·Vanden Bemden, Max [Brussels U.] (ORCID:0009000077257945)·Vander Velde, Catherine [Brussels U.] (ORCID:0000000333927294)·Vanlaer, Pascal [Brussels U.] (ORCID:0000000279314496)·Zhang, Fengwangdong [Brussels U.] (ORCID:0000000261582468)·De Coen, Maarten [Gent U.] (ORCID:0000000258547442)·Dobur, Didar [Gent U.] (ORCID:0000000300124866)·Gokbulut, Gul [Gent U.] (ORCID:0000000201756454)·Marckx, David [Gent U.] (ORCID:0000000167522290)·Skovpen, Kirill [Gent U.] (ORCID:0000000211600621)·Tomaru, Adina Maria [Gent U.]·Van Den Bossche, Niels [Gent U.] (ORCID:0000000329734991)·van der Linden, Jan [Gent U.] (ORCID:000000027174781X)·Vandenbroeck, Jules [Gent U.] (ORCID:0009000461413404)·Wezenbeek, Liam [Gent U.] (ORCID:000000016952891X)·Aarup Petersen, Henriette [Louvain U.] (ORCID:0009000564827466)·Bein, Samuel [Louvain U.] (ORCID:0000000193877407)·Benecke, Anna [Louvain U.] (ORCID:0000000302523609)·Bethani, Agni [Louvain U.] (ORCID:0000000281507043)·Bruno, Giacomo [Louvain U.] (ORCID:0000000188578197)·Cappati, Alessandra [Louvain U.] (ORCID:0000000343860564)·De Favereau De Jeneret, Jerome [Louvain U.] (ORCID:0000000317758574)·Delaere, Christophe [Louvain U.] (ORCID:0000000187076021)·Gameiro Casalinho, Francisco [Louvain U.] (ORCID:0009000753126271)·Giammanco, Andrea [Louvain U.] (ORCID:0000000196408294)·Guzel, Ahmet Oguz [Louvain U.] (ORCID:0000000294045933)·Lemaitre, Vincent [Louvain U.]·Lidrych, Jindrich [Louvain U.] (ORCID:0000000314390196)·Malek, Paul [Louvain U.] (ORCID:0000000331839741)·Mastrapasqua, Paola [Louvain U.] (ORCID:0000000220432367)·Turkcapar, Semra [Louvain U.] (ORCID:0000000326080494)·Alves, Gilvan [Rio de Janeiro, CBPF] (ORCID:0000000283691446)·Barroso Ferreira Filho, Mapse [Rio de Janeiro, CBPF] (ORCID:0000000339040571)·Coelho, Eduardo [Rio de Janeiro, CBPF] (ORCID:0000000161149907)·Hensel, Carsten [Rio de Janeiro, CBPF] (ORCID:0000000188747624)·Matos Figueiredo, Diego [Rio de Janeiro, CBPF] (ORCID:0000000325146930)·Menezes De Oliveira, Thales [Rio de Janeiro, CBPF] (ORCID:0009000947298354)·Mora Herrera, Clemencia [Rio de Janeiro, CBPF] (ORCID:0000000339153170)·Rebello Teles, Patricia [Rio de Janeiro, CBPF] (ORCID:0000000190298506)·Soeiro, Mariana [Rio de Janeiro, CBPF] (ORCID:0000000247676468)·Tonelli Manganote, Edmilson José [Rio de Janeiro, CBPF; U. Campinas] (ORCID:0000000324598521)·Vilela Pereira, Antonio [Rio de Janeiro, CBPF] (ORCID:0000000331774626)·Aldá Júnior, Walter Luiz [Rio de Janeiro State U.] (ORCID:0000000158559817)·Brandao Malbouisson, Helena [Rio de Janeiro State U.] (ORCID:000000021326318X)
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Abstract

Anomaly detection methods used in a recent search for new phenomena by CMS at the CERN LHC are presented. The methods use machine learning to detect anomalous jets produced in the decay of new massive particles without depending on a specific theory model. The effectiveness of these approaches in enhancing sensitivity to various simulated signal samples is studied and compared using data collected in proton–proton collisions at a center-of-mass energy of 13 TeV. In an example analysis, the capabilities of anomaly detection methods are further demonstrated by identifying large-radius jets consistent with Lorentz-boosted hadronically decaying top quarks in a model-agnostic framework.

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BibTeXRIS

Hayrapetyan, Aram [Yerevan Phys. Inst.], Makarenko, Vladimir [Yerevan Phys. Inst.] (ORCID:0000000284068605), Tumasyan, Armen [Yerevan Phys. Inst.] (ORCID:0009000006846742), Adam, Wolfgang [Vienna, OAW] (ORCID:0000000190994341), Benato, Lisa [Vienna, OAW] (ORCID:0000000151357489), Bergauer, Thomas [Vienna, OAW] (ORCID:0000000257860293), Dragicevic, Marko [Vienna, OAW] (ORCID:0000000319676783), Giordano, Cristina [Vienna, OAW], Hussain, Priya Sajid [Vienna, OAW] (ORCID:0000000248255278), Jeitler, Manfred [Vienna, OAW; TU Vienna] (ORCID:0000000251419560), Krammer, Natascha [Vienna, OAW] (ORCID:0000000205480985), Li, Ang [Vienna, OAW] (ORCID:000000024547116X), Liko, Dietrich [Vienna, OAW] (ORCID:000000023380473X), Matthewman, Mark [Vienna, OAW], Schieck, Jochen [Vienna, OAW; TU Vienna] (ORCID:0000000210588093), Schöfbeck, Robert [Vienna, OAW; TU Vienna] (ORCID:0000000223328784), Shooshtari, Maryam [Vienna, OAW] (ORCID:0009000488824887), Sonawane, Mangesh [Vienna, OAW] (ORCID:0000000305107010), Waltenberger, Wolfgang [Vienna, OAW] (ORCID:0000000262157228), Wulz, Claudia-Elisabeth [Vienna, OAW; TU Vienna] (ORCID:0000000192265812), Janssen, Tahys [Antwerp U.] (ORCID:0000000239984081), Kwon, Hyejin [Antwerp U.] (ORCID:0009000251655018), Ocampo Henao, Daniel [Antwerp U.] (ORCID:0000000197593452), Van Laer, Thomas [Antwerp U.] (ORCID:0000000177762108), Van Mechelen, Pierre [Antwerp U.] (ORCID:0000000287319051), Bierkens, Jas [Vrije U., Brussels] (ORCID:0000000208753977), Breugelmans, Nordin [Vrije U., Brussels], D'Hondt, Jorgen [Vrije U., Brussels] (ORCID:0000000295986241), Dansana, Soumya [Vrije U., Brussels] (ORCID:0000000277527471), De Moor, Alexandre [Vrije U., Brussels] (ORCID:0000000159641935), Delcourt, Martin [Vrije U., Brussels] (ORCID:0000000182061787), Heyen, Felix [Vrije U., Brussels], Hong, Yanwen [Vrije U., Brussels] (ORCID:0000000347522458), Kashko, Pavlo [Vrije U., Brussels] (ORCID:0000000270507152), Lowette, Steven [Vrije U., Brussels] (ORCID:0000000339849987), Makarenko, Inna [Vrije U., Brussels] (ORCID:0000000285534508), Müller, Denise [Vrije U., Brussels] (ORCID:0000000217524527), Song, Juhee [Vrije U., Brussels] (ORCID:0000000327315881), Tavernier, Stefaan [Vrije U., Brussels] (ORCID:0000000267929522), Tytgat, Michael [Vrije U., Brussels; Gent U.] (ORCID:0000000239902074), Van Onsem, Gerrit Patrick [Vrije U., Brussels] (ORCID:0000000216642337), Van Putte, Senne [Vrije U., Brussels] (ORCID:0000000315593606), Vannerom, David [Vrije U., Brussels] (ORCID:0000000227475095), Bilin, Bugra [Brussels U.] (ORCID:0000000314397128), Clerbaux, Barbara [Brussels U.] (ORCID:0000000185478211), Das, Aloke Kumar [Brussels U.], De Bruyn, Isabelle [Brussels U.] (ORCID:0000000317044360), De Lentdecker, Gilles [Brussels U.] (ORCID:0000000151247693), Evard, Hugues [Brussels U.] (ORCID:0009000550391462), Favart, Laurent [Brussels U.] (ORCID:0000000316457454), Gianneios, Paraskevas [Brussels U.] (ORCID:0009000372330738), Khalilzadeh, Ali [Brussels U.], Khan, Fakhri Alam [Brussels U.] (ORCID:000900022039277X), Malara, Andrea [Brussels U.] (ORCID:0000000186459282), Shahzad, Muhammad Aamir [Brussels U.], Sharma, Archana [Brussels U.] (ORCID:0000000298601650), Thomas, Laurent [Brussels U.] (ORCID:0000000227563853), Vanden Bemden, Max [Brussels U.] (ORCID:0009000077257945), Vander Velde, Catherine [Brussels U.] (ORCID:0000000333927294), Vanlaer, Pascal [Brussels U.] (ORCID:0000000279314496), Zhang, Fengwangdong [Brussels U.] (ORCID:0000000261582468), De Coen, Maarten [Gent U.] (ORCID:0000000258547442), Dobur, Didar [Gent U.] (ORCID:0000000300124866), Gokbulut, Gul [Gent U.] (ORCID:0000000201756454), Marckx, David [Gent U.] (ORCID:0000000167522290), Skovpen, Kirill [Gent U.] (ORCID:0000000211600621), Tomaru, Adina Maria [Gent U.], Van Den Bossche, Niels [Gent U.] (ORCID:0000000329734991), van der Linden, Jan [Gent U.] (ORCID:000000027174781X), Vandenbroeck, Jules [Gent U.] (ORCID:0009000461413404), Wezenbeek, Liam [Gent U.] (ORCID:000000016952891X), Aarup Petersen, Henriette [Louvain U.] (ORCID:0009000564827466), Bein, Samuel [Louvain U.] (ORCID:0000000193877407), Benecke, Anna [Louvain U.] (ORCID:0000000302523609), Bethani, Agni [Louvain U.] (ORCID:0000000281507043), Bruno, Giacomo [Louvain U.] (ORCID:0000000188578197), Cappati, Alessandra [Louvain U.] (ORCID:0000000343860564), De Favereau De Jeneret, Jerome [Louvain U.] (ORCID:0000000317758574), Delaere, Christophe [Louvain U.] (ORCID:0000000187076021), Gameiro Casalinho, Francisco [Louvain U.] (ORCID:0009000753126271), Giammanco, Andrea [Louvain U.] (ORCID:0000000196408294), Guzel, Ahmet Oguz [Louvain U.] (ORCID:0000000294045933), Lemaitre, Vincent [Louvain U.], Lidrych, Jindrich [Louvain U.] (ORCID:0000000314390196), Malek, Paul [Louvain U.] (ORCID:0000000331839741), Mastrapasqua, Paola [Louvain U.] (ORCID:0000000220432367), Turkcapar, Semra [Louvain U.] (ORCID:0000000326080494), Alves, Gilvan [Rio de Janeiro, CBPF] (ORCID:0000000283691446), Barroso Ferreira Filho, Mapse [Rio de Janeiro, CBPF] (ORCID:0000000339040571), Coelho, Eduardo [Rio de Janeiro, CBPF] (ORCID:0000000161149907), Hensel, Carsten [Rio de Janeiro, CBPF] (ORCID:0000000188747624), Matos Figueiredo, Diego [Rio de Janeiro, CBPF] (ORCID:0000000325146930), Menezes De Oliveira, Thales [Rio de Janeiro, CBPF] (ORCID:0009000947298354), Mora Herrera, Clemencia [Rio de Janeiro, CBPF] (ORCID:0000000339153170), Rebello Teles, Patricia [Rio de Janeiro, CBPF] (ORCID:0000000190298506), Soeiro, Mariana [Rio de Janeiro, CBPF] (ORCID:0000000247676468), Tonelli Manganote, Edmilson José [Rio de Janeiro, CBPF; U. Campinas] (ORCID:0000000324598521), Vilela Pereira, Antonio [Rio de Janeiro, CBPF] (ORCID:0000000331774626), Aldá Júnior, Walter Luiz [Rio de Janeiro State U.] (ORCID:0000000158559817), Brandao Malbouisson, Helena [Rio de Janeiro State U.] (ORCID:000000021326318X). 2026-07-06. Machine-learning techniques for model-independent searches in dijet final states. https://doi.org/10.1088/2632-2153%2Fae7d87

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