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Article: Searches for lepton-flavour-violating decays of the Higgs boson into eτ and μτ in √s = 13 TeV pp collisions with the ATLAS detector

TitleSearches for lepton-flavour-violating decays of the Higgs boson into eτ and μτ in √s = 13 TeV pp collisions with the ATLAS detector
Authors
Aad, GAbbott, BAbeling, KAbicht, NJAbidi, SHAboulhorma, AAbramowicz, HAbreu, HAbulaiti, YAbusleme Hoffman, ACAcharya, BSAdam Bourdarios, CAdamczyk, LAdamek, LAddepalli, SVAddison, MJAdelman, JAdiguzel, AAdorni, SAdye, TAffolder, AAAfik, YAgaras, MNAgarwala, JAggarwal, AAgheorghiesei, CAhmad, AAhmadov, FAhmed, WSAhuja, SAi, XAielli, GAit Tamlihat, MAitbenchikh, BAizenberg, IAkbiyik, MÅkesson, TPAAkimov, AVAkiyama, DAkolkar, NNAl Khoury, KAlberghi, GLAlbert, JAlbicocco, PAlbouy, GLAlderweireldt, SAleksa, MAleksandrov, INAlexa, CAlexopoulos, TAlfonsi, AAlfonsi, FAlhroob, MAli, BAli, SAliev, MAlimonti, GAlkakhi, WAllaire, CAllbrooke, BMMAllendes Flores, CAAllport, PPAloisio, AAlonso, FAlpigiani, CAlvarez Estevez, MAlvarez Fernandez, AAlviggi, MGAly, MAmaral Coutinho, YAmbler, AAmelung, CAmerl, MAmes, CGAmidei, DAmor Dos Santos, SPAmos, KRAnaniev, VAnastopoulos, CAndeen, TAnders, JKAndrean, SYAndreazza, AAngelidakis, SAngerami, AAnisenkov, AVAnnovi, AAntel, CAnthony, MTAntipov, EAntonelli, MAntrim, DJAAnulli, FAoki, MAoki, TAparisi Pozo, JAAparo, MAAperio Bella, LAppelt, CAranzabal, NAraujo Ferraz, VArcangeletti, CArce, ATHArena, EArguin, JFArgyropoulos, SArling, JHArmbruster, AJArnaez, OArnold, HArrubarrena Tame, ZPArtoni, GAsada, HAsai, KAsai, SAsbah, NAAssahsah, JAssamagan, KAstalos, RAtashi, SAtkin, RJAtkinson, MAtlay, NBAtmani, HAtmasiddha, PAAugsten, KAuricchio, SAuriol, ADAustrup, VAAvolio, GAxiotis, KAzuelos, GBabal, DBachacou, HBachas, KBachiu, ABackman, FBadea, ABagnaia, PBahmani, MBailey, AJBailey, VRBaines, JTBakalis, CBaker, OKBakos, EBakshi Gupta, DBalasubramanian, RBaldin, EMBalek, PBallabene, EBalli, FBaltes, LMBalunas, WKBalz, JBanas, EBandieramonte, MBandyopadhyay, ABansal, SBarak, LBarakat, MBarberio, ELBarberis, DBarbero, MBarbour, GBarends, KNBarillari, TBarisits, MSBarklow, TBaron, PBaron Moreno, DABaroncelli, ABarone, GBarr, AJBarr, JDBarranco Navarro, LBarreiro, FBarreiro Guimares da Costa, JBarron, UBarros Teixeira, MGBarsov, SBartels, FBartoldus, RBarton, AEBartos, PBasan, ABaselga, MBassalat, ABasso, MJBasson, CRBates, RLBatlamous, SBatley, JRBatool, BBattaglia, MBattulga, DBauce, MBauer, MBauer, PBazzano Hurrell, LTBeacham, JBBeau, TBeauchemin, PHBecherer, FBechtle, PBeck, HPBecker, KBeddall, AJBednyakov, VABee, CPBeemster, LJBeermann, TABegalli, MBegel, MBehera, ABehr, JKBeirer, JFBeisiegel, FBelfkir, MBella, GBellagamba, LBellerive, ABellos, PBeloborodov, KBelyaev, NLBenchekroun, DBendebba, FBenhammou, YBenoit, MBensinger, JRBentvelsen, SBeresford, LBeretta, MBergeaas Kuutmann, EBerger, NBergmann, BBeringer, JBerlendis, SBernardi, GBernius, CBernlochner, FUBernon, FBerry, TBerta, PBerthold, ABertram, IABethke, SBetti, ABevan, AJBhamjee, MBhatta, SBhattacharya, DSBhattarai, PBhopatkar, VSBi, RBianchi, RMBianco, GBiebel, OBielski, RBiglietti, MBilloud, TRVBindi, MBingul, ABini, CBiondini, ABirch-sykes, CJBird, GABirman, MBiros, MBisanz, TBisceglie, EBiswas, DBitadze, ABjrke, KBloch, IBlocker, CBlue, ABlumenschein, UBlumenthal, JBobbink, GJBobrovnikov, VSBoehler, MBoehm, BBogavac, DBogdanchikov, AGBohm, CBoisvert, VBokan, PBold, TBomben, MBona, MBoonekamp, MBooth, CDBorbély, AGBordulev, ISBorecka-Bielska, HMHuang, SParedes Hernandez, DKPeng, CTam, KCTu, Y
KeywordsHadron-Hadron Scattering
Issue Date21-Jul-2023
PublisherSpringer
Citation
Journal of High Energy Physics, 2023, v. 2023, n. 7, p. 1-74 How to Cite?
Abstract

This paper presents direct searches for lepton flavour violation in Higgs boson decays, H →  and H → μτ, performed using data collected with the ATLAS detector at the LHC. The searches are based on a data sample of proton-proton collisions at a centre-of-mass energy √s = 13 TeV, corresponding to an integrated luminosity of 138 fb1. Leptonic (τ → ℓνντ) and hadronic (τ → hadrons ντ) decays of the τ-lepton are considered. Two background estimation techniques are employed: the MC-template method, based on data-corrected simulation samples, and the Symmetry method, based on exploiting the symmetry between electrons and muons in the Standard Model backgrounds. No significant excess of events is observed and the results are interpreted as upper limits on lepton-flavour-violating branching ratios of the Higgs boson. The observed (expected) upper limits set on the branching ratios at 95% confidence level, B(H → < 0.20% (0.12%) and B(H → μτ ) < 0.18% (0.09%), are obtained with the MC-template method from a simultaneous measurement of potential H →  and H → μτ signals. The best-fit branching ratio difference, B(H → μτ) → B(H → ), measured with the Symmetry method in the channel where the τ-lepton decays to leptons, is (0.25 ± 0.10)%, compatible with a value of zero within 2.5σ.


Persistent Identifierhttp://hdl.handle.net/10722/340579
ISSN
2012 Impact Factor: 5.618
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorAad, G-
dc.contributor.authorAbbott, B-
dc.contributor.authorAbeling, K-
dc.contributor.authorAbicht, NJ-
dc.contributor.authorAbidi, SH-
dc.contributor.authorAboulhorma, A-
dc.contributor.authorAbramowicz, H-
dc.contributor.authorAbreu, H-
dc.contributor.authorAbulaiti, Y-
dc.contributor.authorAbusleme Hoffman, AC-
dc.contributor.authorAcharya, BS-
dc.contributor.authorAdam Bourdarios, C-
dc.contributor.authorAdamczyk, L-
dc.contributor.authorAdamek, L-
dc.contributor.authorAddepalli, SV-
dc.contributor.authorAddison, MJ-
dc.contributor.authorAdelman, J-
dc.contributor.authorAdiguzel, A-
dc.contributor.authorAdorni, S-
dc.contributor.authorAdye, T-
dc.contributor.authorAffolder, AA-
dc.contributor.authorAfik, Y-
dc.contributor.authorAgaras, MN-
dc.contributor.authorAgarwala, J-
dc.contributor.authorAggarwal, A-
dc.contributor.authorAgheorghiesei, C-
dc.contributor.authorAhmad, A-
dc.contributor.authorAhmadov, F-
dc.contributor.authorAhmed, WS-
dc.contributor.authorAhuja, S-
dc.contributor.authorAi, X-
dc.contributor.authorAielli, G-
dc.contributor.authorAit Tamlihat, M-
dc.contributor.authorAitbenchikh, B-
dc.contributor.authorAizenberg, I-
dc.contributor.authorAkbiyik, M-
dc.contributor.authorÅkesson, TPA-
dc.contributor.authorAkimov, AV-
dc.contributor.authorAkiyama, D-
dc.contributor.authorAkolkar, NN-
dc.contributor.authorAl Khoury, K-
dc.contributor.authorAlberghi, GL-
dc.contributor.authorAlbert, J-
dc.contributor.authorAlbicocco, P-
dc.contributor.authorAlbouy, GL-
dc.contributor.authorAlderweireldt, S-
dc.contributor.authorAleksa, M-
dc.contributor.authorAleksandrov, IN-
dc.contributor.authorAlexa, C-
dc.contributor.authorAlexopoulos, T-
dc.contributor.authorAlfonsi, A-
dc.contributor.authorAlfonsi, F-
dc.contributor.authorAlhroob, M-
dc.contributor.authorAli, B-
dc.contributor.authorAli, S-
dc.contributor.authorAliev, M-
dc.contributor.authorAlimonti, G-
dc.contributor.authorAlkakhi, W-
dc.contributor.authorAllaire, C-
dc.contributor.authorAllbrooke, BMM-
dc.contributor.authorAllendes Flores, CA-
dc.contributor.authorAllport, PP-
dc.contributor.authorAloisio, A-
dc.contributor.authorAlonso, F-
dc.contributor.authorAlpigiani, C-
dc.contributor.authorAlvarez Estevez, M-
dc.contributor.authorAlvarez Fernandez, A-
dc.contributor.authorAlviggi, MG-
dc.contributor.authorAly, M-
dc.contributor.authorAmaral Coutinho, Y-
dc.contributor.authorAmbler, A-
dc.contributor.authorAmelung, C-
dc.contributor.authorAmerl, M-
dc.contributor.authorAmes, CG-
dc.contributor.authorAmidei, D-
dc.contributor.authorAmor Dos Santos, SP-
dc.contributor.authorAmos, KR-
dc.contributor.authorAnaniev, V-
dc.contributor.authorAnastopoulos, C-
dc.contributor.authorAndeen, T-
dc.contributor.authorAnders, JK-
dc.contributor.authorAndrean, SY-
dc.contributor.authorAndreazza, A-
dc.contributor.authorAngelidakis, S-
dc.contributor.authorAngerami, A-
dc.contributor.authorAnisenkov, AV-
dc.contributor.authorAnnovi, A-
dc.contributor.authorAntel, C-
dc.contributor.authorAnthony, MT-
dc.contributor.authorAntipov, E-
dc.contributor.authorAntonelli, M-
dc.contributor.authorAntrim, DJA-
dc.contributor.authorAnulli, F-
dc.contributor.authorAoki, M-
dc.contributor.authorAoki, T-
dc.contributor.authorAparisi Pozo, JA-
dc.contributor.authorAparo, MA-
dc.contributor.authorAperio Bella, L-
dc.contributor.authorAppelt, C-
dc.contributor.authorAranzabal, N-
dc.contributor.authorAraujo Ferraz, V-
dc.contributor.authorArcangeletti, C-
dc.contributor.authorArce, ATH-
dc.contributor.authorArena, E-
dc.contributor.authorArguin, JF-
dc.contributor.authorArgyropoulos, S-
dc.contributor.authorArling, JH-
dc.contributor.authorArmbruster, AJ-
dc.contributor.authorArnaez, O-
dc.contributor.authorArnold, H-
dc.contributor.authorArrubarrena Tame, ZP-
dc.contributor.authorArtoni, G-
dc.contributor.authorAsada, H-
dc.contributor.authorAsai, K-
dc.contributor.authorAsai, S-
dc.contributor.authorAsbah, NA-
dc.contributor.authorAssahsah, J-
dc.contributor.authorAssamagan, K-
dc.contributor.authorAstalos, R-
dc.contributor.authorAtashi, S-
dc.contributor.authorAtkin, RJ-
dc.contributor.authorAtkinson, M-
dc.contributor.authorAtlay, NB-
dc.contributor.authorAtmani, H-
dc.contributor.authorAtmasiddha, PA-
dc.contributor.authorAugsten, K-
dc.contributor.authorAuricchio, S-
dc.contributor.authorAuriol, AD-
dc.contributor.authorAustrup, VA-
dc.contributor.authorAvolio, G-
dc.contributor.authorAxiotis, K-
dc.contributor.authorAzuelos, G-
dc.contributor.authorBabal, D-
dc.contributor.authorBachacou, H-
dc.contributor.authorBachas, K-
dc.contributor.authorBachiu, A-
dc.contributor.authorBackman, F-
dc.contributor.authorBadea, A-
dc.contributor.authorBagnaia, P-
dc.contributor.authorBahmani, M-
dc.contributor.authorBailey, AJ-
dc.contributor.authorBailey, VR-
dc.contributor.authorBaines, JT-
dc.contributor.authorBakalis, C-
dc.contributor.authorBaker, OK-
dc.contributor.authorBakos, E-
dc.contributor.authorBakshi Gupta, D-
dc.contributor.authorBalasubramanian, R-
dc.contributor.authorBaldin, EM-
dc.contributor.authorBalek, P-
dc.contributor.authorBallabene, E-
dc.contributor.authorBalli, F-
dc.contributor.authorBaltes, LM-
dc.contributor.authorBalunas, WK-
dc.contributor.authorBalz, J-
dc.contributor.authorBanas, E-
dc.contributor.authorBandieramonte, M-
dc.contributor.authorBandyopadhyay, A-
dc.contributor.authorBansal, S-
dc.contributor.authorBarak, L-
dc.contributor.authorBarakat, M-
dc.contributor.authorBarberio, EL-
dc.contributor.authorBarberis, D-
dc.contributor.authorBarbero, M-
dc.contributor.authorBarbour, G-
dc.contributor.authorBarends, KN-
dc.contributor.authorBarillari, T-
dc.contributor.authorBarisits, MS-
dc.contributor.authorBarklow, T-
dc.contributor.authorBaron, P-
dc.contributor.authorBaron Moreno, DA-
dc.contributor.authorBaroncelli, A-
dc.contributor.authorBarone, G-
dc.contributor.authorBarr, AJ-
dc.contributor.authorBarr, JD-
dc.contributor.authorBarranco Navarro, L-
dc.contributor.authorBarreiro, F-
dc.contributor.authorBarreiro Guimares da Costa, J-
dc.contributor.authorBarron, U-
dc.contributor.authorBarros Teixeira, MG-
dc.contributor.authorBarsov, S-
dc.contributor.authorBartels, F-
dc.contributor.authorBartoldus, R-
dc.contributor.authorBarton, AE-
dc.contributor.authorBartos, P-
dc.contributor.authorBasan, A-
dc.contributor.authorBaselga, M-
dc.contributor.authorBassalat, A-
dc.contributor.authorBasso, MJ-
dc.contributor.authorBasson, CR-
dc.contributor.authorBates, RL-
dc.contributor.authorBatlamous, S-
dc.contributor.authorBatley, JR-
dc.contributor.authorBatool, B-
dc.contributor.authorBattaglia, M-
dc.contributor.authorBattulga, D-
dc.contributor.authorBauce, M-
dc.contributor.authorBauer, M-
dc.contributor.authorBauer, P-
dc.contributor.authorBazzano Hurrell, LT-
dc.contributor.authorBeacham, JB-
dc.contributor.authorBeau, T-
dc.contributor.authorBeauchemin, PH-
dc.contributor.authorBecherer, F-
dc.contributor.authorBechtle, P-
dc.contributor.authorBeck, HP-
dc.contributor.authorBecker, K-
dc.contributor.authorBeddall, AJ-
dc.contributor.authorBednyakov, VA-
dc.contributor.authorBee, CP-
dc.contributor.authorBeemster, LJ-
dc.contributor.authorBeermann, TA-
dc.contributor.authorBegalli, M-
dc.contributor.authorBegel, M-
dc.contributor.authorBehera, A-
dc.contributor.authorBehr, JK-
dc.contributor.authorBeirer, JF-
dc.contributor.authorBeisiegel, F-
dc.contributor.authorBelfkir, M-
dc.contributor.authorBella, G-
dc.contributor.authorBellagamba, L-
dc.contributor.authorBellerive, A-
dc.contributor.authorBellos, P-
dc.contributor.authorBeloborodov, K-
dc.contributor.authorBelyaev, NL-
dc.contributor.authorBenchekroun, D-
dc.contributor.authorBendebba, F-
dc.contributor.authorBenhammou, Y-
dc.contributor.authorBenoit, M-
dc.contributor.authorBensinger, JR-
dc.contributor.authorBentvelsen, S-
dc.contributor.authorBeresford, L-
dc.contributor.authorBeretta, M-
dc.contributor.authorBergeaas Kuutmann, E-
dc.contributor.authorBerger, N-
dc.contributor.authorBergmann, B-
dc.contributor.authorBeringer, J-
dc.contributor.authorBerlendis, S-
dc.contributor.authorBernardi, G-
dc.contributor.authorBernius, C-
dc.contributor.authorBernlochner, FU-
dc.contributor.authorBernon, F-
dc.contributor.authorBerry, T-
dc.contributor.authorBerta, P-
dc.contributor.authorBerthold, A-
dc.contributor.authorBertram, IA-
dc.contributor.authorBethke, S-
dc.contributor.authorBetti, A-
dc.contributor.authorBevan, AJ-
dc.contributor.authorBhamjee, M-
dc.contributor.authorBhatta, S-
dc.contributor.authorBhattacharya, DS-
dc.contributor.authorBhattarai, P-
dc.contributor.authorBhopatkar, VS-
dc.contributor.authorBi, R-
dc.contributor.authorBianchi, RM-
dc.contributor.authorBianco, G-
dc.contributor.authorBiebel, O-
dc.contributor.authorBielski, R-
dc.contributor.authorBiglietti, M-
dc.contributor.authorBilloud, TRV-
dc.contributor.authorBindi, M-
dc.contributor.authorBingul, A-
dc.contributor.authorBini, C-
dc.contributor.authorBiondini, A-
dc.contributor.authorBirch-sykes, CJ-
dc.contributor.authorBird, GA-
dc.contributor.authorBirman, M-
dc.contributor.authorBiros, M-
dc.contributor.authorBisanz, T-
dc.contributor.authorBisceglie, E-
dc.contributor.authorBiswas, D-
dc.contributor.authorBitadze, A-
dc.contributor.authorBjrke, K-
dc.contributor.authorBloch, I-
dc.contributor.authorBlocker, C-
dc.contributor.authorBlue, A-
dc.contributor.authorBlumenschein, U-
dc.contributor.authorBlumenthal, J-
dc.contributor.authorBobbink, GJ-
dc.contributor.authorBobrovnikov, VS-
dc.contributor.authorBoehler, M-
dc.contributor.authorBoehm, B-
dc.contributor.authorBogavac, D-
dc.contributor.authorBogdanchikov, AG-
dc.contributor.authorBohm, C-
dc.contributor.authorBoisvert, V-
dc.contributor.authorBokan, P-
dc.contributor.authorBold, T-
dc.contributor.authorBomben, M-
dc.contributor.authorBona, M-
dc.contributor.authorBoonekamp, M-
dc.contributor.authorBooth, CD-
dc.contributor.authorBorbély, AG-
dc.contributor.authorBordulev, IS-
dc.contributor.authorBorecka-Bielska, HM-
dc.contributor.authorHuang, S-
dc.contributor.authorParedes Hernandez, DK-
dc.contributor.authorPeng, C-
dc.contributor.authorTam, KC-
dc.contributor.authorTu, Y-
dc.date.accessioned2024-03-11T10:45:39Z-
dc.date.available2024-03-11T10:45:39Z-
dc.date.issued2023-07-21-
dc.identifier.citationJournal of High Energy Physics, 2023, v. 2023, n. 7, p. 1-74-
dc.identifier.issn1126-6708-
dc.identifier.urihttp://hdl.handle.net/10722/340579-
dc.description.abstract<p>This paper presents direct searches for lepton flavour violation in Higgs boson decays, <em>H</em> → <em>eτ</em> and <em>H</em> → <em>μτ</em>, performed using data collected with the ATLAS detector at the LHC. The searches are based on a data sample of proton-proton collisions at a centre-of-mass energy √s = 13 TeV, corresponding to an integrated luminosity of 138 fb<sup><em>−</em>1</sup>. Leptonic (<em>τ</em> → <em>ℓν</em><sub><em>ℓ</em></sub><em>ν</em><sub><em>τ</em></sub>) and hadronic (<em>τ</em> → hadrons <em>ν</em><sub><em>τ</em></sub>) decays of the <em>τ</em>-lepton are considered. Two background estimation techniques are employed: the MC-template method, based on data-corrected simulation samples, and the Symmetry method, based on exploiting the symmetry between electrons and muons in the Standard Model backgrounds. No significant excess of events is observed and the results are interpreted as upper limits on lepton-flavour-violating branching ratios of the Higgs boson. The observed (expected) upper limits set on the branching ratios at 95% confidence level, B(<em>H</em> → <em>eτ</em>) <em><</em> 0<em>.</em>20% (0<em>.</em>12%) and B(<em>H</em> → <em>μτ</em> ) <em><</em> 0<em>.</em>18% (0<em>.</em>09%), are obtained with the MC-template method from a simultaneous measurement of potential <em>H</em> → <em>eτ</em> and <em>H</em> → <em>μτ</em> signals. The best-fit branching ratio difference, B(<em>H</em> → <em>μτ</em>) → B(<em>H</em> → <em>eτ</em>), measured with the Symmetry method in the channel where the <em>τ</em>-lepton decays to leptons, is (0<em>.</em>25 ± 0<em>.</em>10)%, compatible with a value of zero within 2<em>.</em>5<em>σ</em>.<br></p>-
dc.languageeng-
dc.publisherSpringer-
dc.relation.ispartofJournal of High Energy Physics-
dc.rightsThis work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.-
dc.subjectHadron-Hadron Scattering-
dc.titleSearches for lepton-flavour-violating decays of the Higgs boson into eτ and μτ in √s = 13 TeV pp collisions with the ATLAS detector-
dc.typeArticle-
dc.identifier.doi10.1007/JHEP07(2023)166-
dc.identifier.scopuseid_2-s2.0-85165876369-
dc.identifier.volume2023-
dc.identifier.issue7-
dc.identifier.spage1-
dc.identifier.epage74-
dc.identifier.eissn1029-8479-
dc.identifier.isiWOS:001061947900001-
dc.identifier.issnl1029-8479-

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