Search for A^{'}→μ^{+}μ^{-} Decays.
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Schreiner, M Schubiger,S Schulte, M H Schune, R Schwemmer,B Sciascia, A Sciubba,S Sellam, A Semennikov,A Sergi, N Serra,J Serrano,L Sestini,A Seuthe, P Seyfert, D M Shangase, M Shapkin, T Shears, L Shekhtman,V Shevchenko, E Shmanin, J D Shupperd, B G Siddi,R Silva Coutinho,L Silva de Oliveira, G Simi,S Simone, I Skiba, N Skidmore, T Skwarnicki, M W Slater,J G Smeaton, A Smetkina,E Smith,I T Smith,M Smith, A Snoch,M Soares,L Soares Lavra, M D Sokoloff,F J P Soler,B Souza De Paula, B Spaan,E Spadaro Norella,P Spradlin, F Stagni,M Stahl,S Stahl,P Stefko,S Stefkova,O Steinkamp,S Stemmle, O Stenyakin,M Stepanova,H Stevens,S Stone,S Stracka, M E Stramaglia,M Straticiuc,S Strokov,J Sun,L Sun,Y Sun,P Svihra,K Swientek,A Szabelski,T Szumlak,M Szymanski, S Taneja,Z Tang, T Tekampe, G Tellarini, F Teubert,E Thomas, K A Thomson,M J Tilley, V Tisserand,S T'Jampens,M Tobin, S Tolk,L Tomassetti,D Tonelli,D Y Tou, E Tournefier, M Traill,M T Tran, C Trippl, A Trisovic,A Tsaregorodtsev,G Tuci,A Tully,N Tuning,A Ukleja, A Usachov,A Ustyuzhanin,U Uwer, A Vagner,V Vagnoni,A Valassi, G Valenti,M van Beuzekom,H Van Hecke,E van Herwijnen, C B Van Hulse,J van Tilburg,M van Veghel,R Vazquez Gomez,P Vazquez Regueiro,C Vázquez Sierra,S Vecchi,J J Velthuis,M Veltri,A Venkateswaran,M Vernet, M Veronesi,M Vesterinen,J V Viana Barbosa, D Vieira,M Vieites Diaz, H Viemann,X Vilasis-Cardona,A Vitkovskiy,V Volkov, A Vollhardt,D Vom Bruch, A Vorobyev,V Vorobyev,N Voropaev, R Waldi, J Walsh, J Wang,M Wang,Y Wang,Z Wang,D R Ward,H M Wark, N K Watson,D Websdale, A Weiden,C Weisser, B D C Westhenry,D J White,M Whitehead, D Wiedner,G Wilkinson,M Wilkinson,I Williams,M Williams,M R J Williams,T Williams, F F Wilson, M Winn,W Wislicki,M Witek,G Wormser, S A Wotton,H Wu, K Wyllie,Z Xiang, D Xiao,Y Xie,H Xing,A Xu,L Xu,M Xu,Q Xu,Z Xu,Z Yang,Y Yao,L E Yeomans,H Yin,J Yu,X Yuan, O Yushchenko,K A Zarebski,M Zavertyaev, M Zdybal,M Zeng,D Zhang, L Zhang,S Zhang,W C Zhang,Y Zhang, A Zhelezov,Y Zheng,X Zhou,Y Zhou,X Zhu,V Zhukov, J B Zonneveld,S Zucchelli
PHYSICAL REVIEW LETTERS（2020）
引用 150|浏览139
摘要
Searches are performed for both promptlike and long-lived dark photons, A ', produced in proton-proton collisions at a center-of-mass energy of 13 TeV. These searches look for A '->mu(+)mu(-) decays using a data sample corresponding to an integrated luminosity of 5.5 fb(-1) collected with the LHCb detector. Neither search finds evidence for a signal, and 90% confidence-level exclusion limits are placed on the gamma-A ' kinetic mixing strength. The promptlike A ' search explores the mass region from near the dimuon threshold up to 70 GeV and places the most stringent constraints to date on dark photons with 214 < m(A ') less than or similar to 740 MeV and 10.6 < m(A ') less than or similar to 30 GeV. The search for long-lived A '->mu(+)mu(-) decays places world-leading constraints on low-mass dark photons with lifetimes O(1)ps.
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