Updated search for long-lived particles decaying to jet pairs

对衰变为喷注对的长寿命粒子的最新搜索

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作者：Aaij,R,Adeva,B,Adinolfi,M,Ajaltouni,Z,Akar,S,Albrecht,J,Alessio,F,Alexander,M,Ali,S,Alkhazov,G,Alvarez Cartelle,P,Alves,A A Jr,Amato,S,Amerio,S,Amhis,Y,An,L,Anderlini,L,Andreassi,G,Andreotti,M,Andrews,J E,Appleby,R B,Archilli,F,d'Argent,P,Arnau Romeu,J,Artamonov,A,Artuso,M,Aslanides,E,Auriemma,G,Baalouch,M,Babuschkin,I,Bachmann,S,Back,J J,Badalov,A,Baesso,C,Baker,S,Balagura,V,Baldini,W,Baranov,A,Barlow,R J,Barschel,C,Barsuk,S,Barter,W,Baryshnikov,F,Baszczyk,M,Batozskaya,V,Battista,V,Bay,A,Beaucourt,L,Beddow,J,Bedeschi,F,Bediaga,I,Beiter,A,Bel,L J,Bellee,V,Belloli,N,Belous,K,Belyaev,I,Ben-Haim,E,Bencivenni,G,Benson,S,Beranek,S,Berezhnoy,A,Bernet,R,Bertolin,A,Betancourt,C,Betti,F,Bettler,M-O,van Beuzekom,M,Bezshyiko,Ia,Bifani,S,Billoir,P,Bird,T,Birnkraut,A,Bitadze,A,Bizzeti,A,Blake,T,Blanc,F,Blouw,J,Blusk,S,Bocci,V,Boettcher,T,Bondar,A,Bondar,N,Bonivento,W,Bordyuzhin,I,Borgheresi,A,Borghi,S,Borisyak,M,Borsato,M,Bossu,F,Boubdir,M,Bowcock,T J V,Bowen,E,Bozzi,C,Braun,S,Britsch,M,Britton,T,Brodzicka,J,Buchanan,E,Burr,C,Bursche,A,Buytaert,J,Cadeddu,S,Calabrese,R,Calvi,M,Calvo Gomez,M,Camboni,A,Campana,P,Campora Perez,D H,Capriotti,L,Carbone,A,Carboni,G,Cardinale,R,Cardini,A,Carniti,P,Carson,L,Carvalho Akiba,K,Casse,G,Cassina,L,Castillo Garcia,L,Cattaneo,M,Cavallero,G,Cenci,R,Chamont,D,Charles,M,Charpentier,Ph,Chatzikonstantinidis,G,Chefdeville,M,Chen,S,Cheung,S F,Chobanova,V,Chrzaszcz,M,Cid Vidal,X,Ciezarek,G,Clarke,P E L,Clemencic,M,Cliff,H V,Closier,J,Coco,V,Cogan,J,Cogneras,E,Cogoni,V,Cojocariu,L,Collins,P,Comerma-Montells,A,Contu,A,Cook,A,Coombs,G,Coquereau,S,Corti,G,Corvo,M,Costa Sobral,C M,Couturier,B,Cowan,G A,Craik,D C,Crocombe,A,Cruz Torres,M,Cunliffe,S,Currie,R,D'Ambrosio,C,Da Cunha Marinho,F,Dall'Occo,E,Dalseno,J,David,P N Y,Davis,A,De Bruyn,K,De Capua,S,De Cian,M,De Miranda,J M,De Paula,L,De Serio,M,De Simone,P,Dean,C T,Decamp,D,Deckenhoff,M,Del Buono,L,Demmer,M,Dendek,A,Derkach,D,Deschamps,O,Dettori,F,Dey,B,Di 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H,Rama,M,Ramos Pernas,M,Rangel,M S,Raniuk,I,Ratnikov,F,Raven,G,Redi,F,Reichert,S,Dos Reis,A C,Remon Alepuz,C,Renaudin,V,Ricciardi,S,Richards,S,Rihl,M,Rinnert,K,Rives Molina,V,Robbe,P,Rodrigues,A B,Rodrigues,E,Rodriguez Lopez,J A,Rodriguez Perez,P,Rogozhnikov,A,Roiser,S,Rollings,A,Romanovskiy,V,Romero Vidal,A,Ronayne,J W,Rotondo,M,Rudolph,M S,Ruf,T,Ruiz Valls,P,Saborido Silva,J J,Sadykhov,E,Sagidova,N,Saitta,B,Salustino Guimaraes,V,Sanchez Gonzalo,D,Sanchez Mayordomo,C,Sanmartin Sedes,B,Santacesaria,R,Santamarina Rios,C,Santimaria,M,Santovetti,E,Sarti,A,Satriano,C,Satta,A,Saunders,D M,Savrina,D,Schael,S,Schellenberg,M,Schiller,M,Schindler,H,Schlupp,M,Schmelling,M,Schmelzer,T,Schmidt,B,Schneider,O,Schopper,A,Schreiner,H F,Schubert,K,Schubiger,M,Schune,M-H,Schwemmer,R,Sciascia,B,Sciubba,A,Semennikov,A,Sergi,A,Serra,N,Serrano,J,Sestini,L,Seyfert,P,Shapkin,M,Shapoval,I,Shcheglov,Y,Shears,T,Shekhtman,L,Shevchenko,V,Siddi,B G,Silva Coutinho,R,Silva de Oliveira,L,Simi,G,Simone,S,Sirendi,M,Skidmore,N,Skwarnicki,T,Smith,E,Smith,I T,Smith,J,Smith,M,Soares Lavra,L,Sokoloff,M D,Soler,F J P,Souza De Paula,B,Spaan,B,Spradlin,P,Sridharan,S,Stagni,F,Stahl,M,Stahl,S,Stefko,P,Stefkova,S,Steinkamp,O,Stemmle,S,Stenyakin,O,Stevens,H,Stevenson,S,Stoica,S,Stone,S,Storaci,B,Stracka,S,Stramaglia,M E,Straticiuc,M,Straumann,U,Sun,L,Sutcliffe,W,Swientek,K,Syropoulos,V,Szczekowski,M,Szumlak,T,T'Jampens,S,Tayduganov,A,Tekampe,T,Tellarini,G,Teubert,F,Thomas,E,van Tilburg,J,Tilley,M J,Tisserand,V,Tobin,M,Tolk,S,Tomassetti,L,Tonelli,D,Topp-Joergensen,S,Toriello,F,Tournefier,E,Tourneur,S,Trabelsi,K,Traill,M,Tran,M T,Tresch,M,Trisovic,A,Tsaregorodtsev,A,Tsopelas,P,Tully,A,Tuning,N,Ukleja,A,Ustyuzhanin,A,Uwer,U,Vacca,C,Vagnoni,V,Valassi,A,Valat,S,Valenti,G,Vazquez Gomez,R,Vazquez Regueiro,P,Vecchi,S,van Veghel,M,Velthuis,J J,Veltri,M,Veneziano,G,Venkateswaran,A,Vernet,M,Vesterinen,M,Viana Barbosa,J V,Viaud,B,Vieira,D,Vieites 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期刊：European Physical Journal C影响因子：4.800
时间：2017起止号：2017;77(12):812
doi：10.1140/epjc/s10052-017-5178-x

Abstract

A search is presented for long-lived particles with a mass between 25 and 50 GeV/c2 and a lifetime between 2 and 500 ps, using proton-proton collision data corresponding to an integrated luminosity of 2.0 fb-1 , collected by the LHCb detector at centre-of-mass energies of 7 and 8 TeV. The particles are assumed to be pair-produced in the decay of a 125 GeV/c2 Standard-Model-like Higgs boson. The experimental signature is a single long-lived particle, identified by a displaced vertex with two associated jets. No excess above background is observed and limits are set on the production cross-section as a function of the mass and lifetime of the long-lived particle.

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