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.
Search for neutral long-lived particles in pp collisions at √s = 13 TeV that decay into displaced hadronic jets in the ATLAS calorimeter
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Liberatore M; Liberti B; Lie K; Marin JL; Lin K; Linck RA; Lindley RE; Lindon JH; Linss A; Lipeles E; Lipniacka A; Liss TM; Lister A; Little JD; Liu B; Liu BX; Liu D; Liu JB; Liu JKK; Liu K; Liu M; Liu MY; Liu P; Liu Q; Liu X; Liu Y; Liu Y; Liu YL; Liu YW; Livan M; Merino JL; Lloyd SL; Lobodzinska EM; Loch P; Loffredo S; Lohse T; Lohwasser K; Lokajicek M; Long JD; Longarini I; Longo L; Longo R; Paz IL; Solis AL; Lorenz J; Martinez NL; Lory AM; Losle A; Lou X; Lou X; Lounis A; Love J; Love PA; Bahilo JJL; Lu G; Lu M; Lu S; Lu YJ; Lubatti HJ; Luci C; Alves FLL; Lucotte A; Luehring F; Luise I; Lundberg O; Lund-Jensen B; Luongo NA; Lutz MS; Lynn D; Lyons H; Lysak R; Lytken E; Lyu F; Lyubushkin V; Lyubushkina T; Ma H; Ma LL; Ma Y; Mac Donell DM; Maccarrone G; MacDonald JC; Madar R; Mader WF; Maeda J; Maeno T; Maerker M; Magerl V; Magro J; Mahon DJ; Maidantchik C; Maio A; Maj K; Majersky O; Majewski S; Makovec N; Maksimovic V; Malaescu B; Malecki P; Maleev VP; Malek F; Malito D; Mallik U; Malone C; Maltezos S; Malyukov S; Mamuzic J; Mancini G; Mandalia JP; de Andrade LM; Maniatis IM; Manisha M; Ramos JM; Mankad DC; Mankinen KH; Mann A; Manousos A; Mansoulie B; Manzoni S; Marantis A; Marchiori G; Marcisovsky M; Marcoccia L; Marcon C; Marinescu M; Marjanovic M; Marshall Z; Marti-Garcia S; Martin TA; Martin VJ; Latour BMD; Martinelli L; Martinez M; Agullo PM; Outschoorn VIM; Suarez PM; Martin-Haugh S; Martoiu VS; Martyniuk AC; Marzin A; Maschek SR; Masetti L; Mashimo T; Masik J; Maslennikov AL; Massa L; Massarotti P; Mastrandrea P; Mastroberardino A; Masubuchi T; Mathisen T; Matic A; Matsuzawa N; Maurer J; Maximov DA; Mazini R; Maznas I; Mazza M; Mazza SM; Mc Ginn C; Mc Gowan JP; Mc Kee SP; McCarthy TG; McCormack WP; McDonald EF; McDougall AE; Mcfayden JA; Mchedlidze G; McKay MA; Mckenzie RP; Mclaughlin DJ; McLean KD; McMahon SJ; McNamara PC; McPherson RA; Mdhluli JE; Meehan S; Megy T; Mehlhase S; Mehta A; Meirose B; Melini D; Garcia BRM; Melo AH; Meloni F; Melzer A; Gouveia EDM; Da Costa AMMJ; Meng HY; Meng L; Menke S; Mentink M; Meoni E; Merlassino C; Merola L; Meroni C; Merz G; Meshkov O; Meshreki JKR; Metcalfe J; Mete AS; Meyer C; Meyer JP; Michetti M; Middleton RP; Mijovic L; Mikenberg G; Mikestikova M; Mikuz M; Mildner H; Milic A; Milke CD; Miller DW; Miller LS; Milov A; Milstead DA; Min T; Minaenko AA; Minashvili IA; Mince L; Mincer AI; Mindur B; Mineev; Minegishi Y; Mino Y; Mir LM; Lopez MM; Mironova M; Mitani T; Mitra A; Mitsou VA; Miu O; Miyagawa PS; Miyazaki Y; Mizukami A; Mjornmark JU; Mkrtchyan T; Mlynarikova M; Moa T; Mobius S; Mochizuki K; Moder P; Mogg P; Mohammed AF; Mohapatra S; Mokgatitswane G; Mondal B; Mondal S; Monig K; Monnier E; Romero LM; Berlingen JM; Montella M; Monticelli F; Morange N; De Carvalho ALM; Llacer MM; Martinez CM; Morettini P; Morgenstern S; Mori D; Morii M; Morinaga M; Morisbak V; Morley AK; Morvaj L; Moschovakos P; Moser B; Mosidze M; Moskalets T; Moskvitina P; Moss J; Moyse EJW; Muanza S; Mueller J; Mueller R; Muenstermann D; Mullier GA; Mullin JJ; Mungo DP; Martinez JLM; Sanchez FJM; Murin M; Murray WJ; Murrone A; Muse JM; Muskinja M; Mwewa C; Myagkov AG; Myers AJ; Myers AA; Myers G; Myska M; Nachman BP; Nackenhorst O; Nag AN; Nagai K; Nagano K; Nagle JL; Nagy E; Nairz AM; Nakahama Y; Nakamura K; Nanjo H; Narayan R; Narayanan EA; Naryshkin I; Naseri M; Nass C; Navarro G; Navarro-Gonzalez J; Nayak R; Nechaeva PY; Nechansky F; Neep TJ; Negri A; Negrini M; Nellist C; Nelson C; Nelson K; Nemecek S; Nessi M; Neubauer MS; Neuhaus F; Neundorf J; Newhouse R; Newman PR; Ng CW; Ng YS; Ng YWY; Ngair B; Nguyen HDN; Nickerson RB; Nicolaidou R; Nielsen DS; Nielsen J; Niemeyer M; Nikiforou N; Nikolaenko V; Nikolic-Audit I; Nikolopoulos K; Nilsson P; Nindhito HR; Nisati A; Nishu N; Nisius R; Rosende SJN; Nobe T; Noel DL; Noguchi Y; Nomidis I; Nomura MA; Norfolk MB; Norisam RRB; Novak J; Novak T; Novgorodova O; Novotny L; Novotny R; Nozka L; Ntekas K; Nurse E; Oakham FG; Ocariz J; Ochi A; Ochoa I; Ochoa-Ricoux JP; Oda S; Oerdek S; Ogrodnik A; Oh A; Ohm CC; Oide H; Oishi R; Ojeda ML; Okazaki Y; O'Keefe MW; Okumura Y; Olariu A; Seabra LFO; Pino SAO; Damazio DO; Goncalves DO; Oliver JL; Olsson MJR; Olszewski A; Olszowska J; OOncel O; O'Neil DC; O'neill AP; Onofre A; Onyisi PUE; Madriz RGO; Oreglia MJ; Orellana GE; Orestano D; Orlando N; Orr RS; O'Shea V; Ospanov R; Garzon GOY; Otono H; Ott PS; Ottino GJ; Ouchrif M; Ouellette J; Ould-Saada F; Owen M; Owen RE; Oyulmaz KY; Ozcan VE; Ozturk N; Ozturk S; Pacalt J; Pacey HA; Pachal K; Pages AP; Aranda CP; Griso SP; Palacino G; Palazzo S; Palestini S; Palka M; Pan J; Panchal DK; Pandini CE; Vazquez JGP; Pani P; Panizzo G; Paolozzi L; Papadatos C; Parajuli S; Paramonov A; Paraskevopoulos C; Hernandez DP; Parida B; Park TH; Parker AJ; Parker MA; Parodi F; Parrish EW; Parrish VA; Parsons JA; Parzefall U; Dias BP; Dominguez LP; Pascuzzi VR; Pasquali F; Pasqualucci E; Passaggio S; Pastore F; Pasuwan P; Pater JR; Pathak A; Patton J; Pauly T; Pearkes J; Pedersen M; Pedro R; Peleganchuk SV; Penc O; Peng C; Peng H; Penzin M; Peralva BS; Peixoto APP; Sanchez LP; Perepelitsa DV; Codina EP; Perganti M; Perini L; Pernegger H; Perrella S; Perrevoort A; Perrin O; Peters K; Peters RFY; Petersen BA; Petersen TC; Petit E; Petousis V; Petridou C; Petrukhin A; Pettee M; Pettersson NE; Petukhova K; Peyaud A; Pezoa R; Pezzotti L; Pezzullo G; Pham T; Phillips PW; Phipps MW; Piacquadio G; Pianori E; Piazza F; Piegaia R; Pietreanu D; Pilkington AD; Pinamonti M; Pinfold JL; Donaldson CP; Pizzi DA; Pizzimento L; Pizzini A; Pleier MA; Plesanovs V; Pleskot V; Plotnikova E; Poddar G; Poettgen R; Poggi R; Poggioli L; Pogrebnyak I; Pohl D; Pokharel I; Polacek S; Polesello G; Poley A; Polifka R; Polini A; Pollard CS; Pollock ZB; Polychronakos V; Ponomarenko D; Pontecorvo L; Popa S; Popeneciu GA; Quintero DMP; Pospisil S; Postolache P; Potamianos K; Potrap IN; Potter CJ; Potti H; Poulsen T; Poveda J; Pownall G; Astigarraga MEP; Ibanez AP; Pralavorio P; Prapa MM; Price D; Primavera M; Martin MAP; Proffitt ML; Proklova N; Prokofiev K; Prokoshin F; Proto G; Protopopescu S; Proudfoot J; Przybycien M; Pudzha D; Puzo P; Pyatiizbyantseva D; Qian J; Qin Y; Qiu T; Quadt A; Queitsch-Maitland M; Bolanos GR; Rafanoharana D; Ragusa F; Raine JA; Rajagopalan S; Ran K; Raskina V; Rassloff DF; Rave S; Ravina B; Ravinovich I; Raymond M; Read AL; Readioff NP; Rebuzzi DM; Redlinger G; Reeves K; Reikher D; Reiss A; Rej A; Rembser C; Renardi A; Renda M; Rendel MB; Rennie AG; Resconi S; Ressegotti M; Resseguie ED; Rettie S; Reynolds B; Reynolds E; Estabragh MR; Rezanova OL; Reznicek P; Ricci E; Richter R; Richter S; Richter-Was E; Ridel M; Rieck P; Riedler P; Rijssenbeek M; Rimoldi A; Rimoldi M; Rinaldi L; Rinn TT; Rinnagel MP; Ripellino G; Riu I; Rivadeneira P; Vergara JCR; Rizatdinova F; Rizvi E; Rizzi C; Roberts BA; Roberts BR; Robertson SH; Robin M; Robinson D; Gajardo CMR; Manzano MR; Robson A; Rocchi A; Roda C ;Bosca SR; Garcia YR; Rodriguez AR; Vera AMR; Roe S; Roemer JT; Roepe AR; Roggel J; Rohne O; Rojas RA; Roland B; Roland CPA; Roloff J; Romaniouk A; Romano M; Hernandez ACR; Rompotis N; Ronzani M; Roos L; Rosati S; Rosser BJ; Rossi E; Rossi E; Rossi LP; Rossini L; Rosten R; Rotaru M; Rottler B; Rousseau D; Rousso D; Rovelli G; Roy A; Rozanov A; Rozen Y; Ruan X; Ruby AJ; Ruggeri TA; Ruhr F; Ruiz-Martinez A; Rummler A; Rurikova Z; Rusakovich NA; Russell HL; Rustige L; Rutherfoord JP; Ruttinger EM; Rybacki K; Rybar M; Rye EB; Ryzhov A; Iglesias JAS; Sabatini P; Sabetta L; Sadrozinski HFW; Sadykov R; Tehrani FS; Samani BS; Safdari M; Saha S; Sahinsoy M; Sahu A; Saimpert M; Saito M; Saito T; Salamani D; Salamanna G;