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Search for a Dark Leptophilic Scalar in e^{+}e^{-} Collisions.

  • Author(s): Lees, JP;
  • Poireau, V;
  • Tisserand, V;
  • Grauges, E;
  • Palano, A;
  • Eigen, G;
  • Brown, DN;
  • Kolomensky, Yu G;
  • Fritsch, M;
  • Koch, H;
  • Schroeder, T;
  • Cheaib, R;
  • Hearty, C;
  • Mattison, TS;
  • McKenna, JA;
  • So, RY;
  • Blinov, VE;
  • Buzykaev, AR;
  • Druzhinin, VP;
  • Golubev, VB;
  • Kozyrev, EA;
  • Kravchenko, EA;
  • Onuchin, AP;
  • Serednyakov, SI;
  • Skovpen, Yu I;
  • Solodov, EP;
  • Todyshev, K Yu;
  • Lankford, AJ;
  • Dey, B;
  • Gary, JW;
  • Long, O;
  • Eisner, AM;
  • Lockman, WS;
  • Panduro Vazquez, W;
  • Chao, DS;
  • Cheng, CH;
  • Echenard, B;
  • Flood, KT;
  • Hitlin, DG;
  • Kim, J;
  • Li, Y;
  • Lin, DX;
  • Miyashita, TS;
  • Ongmongkolkul, P;
  • Oyang, J;
  • Porter, FC;
  • Röhrken, M;
  • Huard, Z;
  • Meadows, BT;
  • Pushpawela, BG;
  • Sokoloff, MD;
  • Sun, L;
  • Smith, JG;
  • Wagner, SR;
  • Bernard, D;
  • Verderi, M;
  • Bettoni, D;
  • Bozzi, C;
  • Calabrese, R;
  • Cibinetto, G;
  • Fioravanti, E;
  • Garzia, I;
  • Luppi, E;
  • Santoro, V;
  • Calcaterra, A;
  • de Sangro, R;
  • Finocchiaro, G;
  • Martellotti, S;
  • Patteri, P;
  • Peruzzi, IM;
  • Piccolo, M;
  • Rotondo, M;
  • Zallo, A;
  • Passaggio, S;
  • Patrignani, C;
  • Shuve, BJ;
  • Lacker, HM;
  • Bhuyan, B;
  • Mallik, U;
  • Chen, C;
  • Cochran, J;
  • Prell, S;
  • Gritsan, AV;
  • Arnaud, N;
  • Davier, M;
  • Le Diberder, F;
  • Lutz, AM;
  • Wormser, G;
  • Lange, DJ;
  • Wright, DM;
  • Coleman, JP;
  • Gabathuler, E;
  • Hutchcroft, DE;
  • Payne, DJ;
  • Touramanis, C;
  • Bevan, AJ;
  • Di Lodovico, F;
  • Sacco, R;
  • Cowan, G;
  • Banerjee, Sw;
  • Brown, DN;
  • Davis, CL;
  • Denig, AG;
  • Gradl, W;
  • Griessinger, K;
  • Hafner, A;
  • Schubert, KR;
  • Barlow, RJ;
  • Lafferty, GD;
  • Cenci, R;
  • Jawahery, A;
  • Roberts, DA;
  • Cowan, R;
  • Robertson, SH;
  • Seddon, RM;
  • Neri, N;
  • Palombo, F;
  • Cremaldi, L;
  • Godang, R;
  • Summers, DJ;
  • Taras, P;
  • De Nardo, G;
  • Sciacca, C;
  • Raven, G;
  • Jessop, CP;
  • LoSecco, JM;
  • Honscheid, K;
  • Kass, R;
  • Gaz, A;
  • Margoni, M;
  • Posocco, M;
  • Simi, G;
  • Simonetto, F;
  • Stroili, R;
  • Akar, S;
  • Ben-Haim, E;
  • Bomben, M;
  • Bonneaud, GR;
  • Calderini, G;
  • Chauveau, J;
  • Marchiori, G;
  • Ocariz, J;
  • Biasini, M;
  • Manoni, E;
  • Rossi, A;
  • Batignani, G;
  • Bettarini, S;
  • Carpinelli, M;
  • Casarosa, G;
  • Chrzaszcz, M;
  • Forti, F;
  • Giorgi, MA;
  • Lusiani, A;
  • Oberhof, B;
  • Paoloni, E;
  • Rama, M;
  • Rizzo, G;
  • Walsh, JJ;
  • Zani, L;
  • Smith, AJS;
  • Anulli, F;
  • Faccini, R;
  • Ferrarotto, F;
  • Ferroni, F;
  • Pilloni, A;
  • Piredda, G;
  • Bünger, C;
  • Dittrich, S;
  • Grünberg, O;
  • Heß, M;
  • Leddig, T;
  • Voß, C;
  • Waldi, R;
  • Adye, T;
  • Wilson, FF;
  • Emery, S;
  • Vasseur, G;
  • Aston, D;
  • Cartaro, C;
  • Convery, MR;
  • Dorfan, J;
  • Dunwoodie, W;
  • Ebert, M;
  • Field, RC;
  • Fulsom, BG;
  • Graham, MT;
  • Hast, C;
  • Innes, WR;
  • Kim, P;
  • Leith, DWGS;
  • Luitz, S;
  • MacFarlane, DB;
  • Muller, DR;
  • Neal, H;
  • Ratcliff, BN;
  • Roodman, A;
  • Sullivan, MK;
  • Va'vra, J;
  • Wisniewski, WJ;
  • Purohit, MV;
  • Wilson, JR;
  • Randle-Conde, A;
  • Sekula, SJ;
  • Ahmed, H;
  • Bellis, M;
  • Burchat, PR;
  • Puccio, EMT;
  • Alam, MS;
  • Ernst, JA;
  • Gorodeisky, R;
  • Guttman, N;
  • Peimer, DR;
  • Soffer, A;
  • Spanier, SM;
  • Ritchie, JL;
  • Schwitters, RF;
  • Izen, JM;
  • Lou, XC;
  • Bianchi, F;
  • De Mori, F;
  • Filippi, A;
  • Gamba, D;
  • Lanceri, L;
  • Vitale, L;
  • Martinez-Vidal, F;
  • Oyanguren, A;
  • Albert, J;
  • Beaulieu, A;
  • Bernlochner, FU;
  • King, GJ;
  • Kowalewski, R;
  • Lueck, T;
  • Nugent, IM;
  • Roney, JM;
  • Sobie, RJ;
  • Tasneem, N;
  • Gershon, TJ;
  • Harrison, PF;
  • Latham, TE;
  • Prepost, R;
  • Wu, SL;
  • <i>B<span class="sc">A</span>B<span class="sc">AR</span></i> Collaboration
  • et al.
Abstract

Many scenarios of physics beyond the standard model predict the existence of new gauge singlets, which might be substantially lighter than the weak scale. The experimental constraints on additional scalars with masses in the MeV to GeV range could be significantly weakened if they interact predominantly with leptons rather than quarks. At an e^{+}e^{-} collider, such a leptophilic scalar (ϕ_{L}) would be produced predominantly through radiation from a τ lepton. We report herein a search for e^{+}e^{-}→τ^{+}τ^{-}ϕ_{L}, ϕ_{L}→ℓ^{+}ℓ^{-} (ℓ=e, μ) using data collected by the BABAR experiment at SLAC. No significant signal is observed, and we set limits on the ϕ_{L} coupling to leptons in the range 0.04

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