Search for new particles in events with one lepton and missing transverse momentum in $pp$ collisions at $\sqrt{s}$ = 8 TeV with the ATLAS detector

G. Aad (1) , L. Alio (1) , M. Barbero (1) , C. Bertella (1) , J.C. Clémens (1) , Y. Coadou (1) , Sara Diglio (1) , F. Djama (1) , L. Feligioni (1) , D. Hoffmann (1) , F. Hubaut (1) , E. B. F. G. Knoops (1) , E. Le Guirriec (1) , B. Li (1) , D. Madaffari (1) , K. Mochizuki (1) , E. Monnier (1) , S. Muanza (1) , Y. Nagai (1) , P. Pralavorio (1) , A. Rozanov (1) , T. Serre (1) , M. Talby (1) , N. Tannoury (1) , E. Tiouchichine (1) , S. Tisserant (1) , J. Toth (1) , F. Touchard (1) , M. Ughetto (1) , L. Vacavant (1) , D. Boumediene (2) , Emmanuel Busato (2) , D. Calvet (2) , S. Calvet (2) , J. Donini (2) , E. Dubreuil (2) , N. Ghodbane (2) , G. Gilles (2) , Ph. Gris (2) , C. Guicheney (2) , H. Liao (2) , D. Pallin (2) , Daniela Paredes Hernández (2) , F. Podlyski (2) , C. Santoni (2) , Timothée Theveneaux-Pelzer (2) , Loïc Valery (2) , F. Vazeille (2) , T. Beau (3) , M. Bomben (3) , G. Calderini (3) , F. Crescioli (3) , O. Davignon (3) , S. de Cecco (3) , A. Demilly (3) , F. Derue (3) , P. Francavilla (3) , M.W. Krasny (3) , D. Lacour (3) , B. Laforge (3) , S. Laplace (3) , O. Le Dortz (3) , G. Lefebvre (3) , B. Malaescu (3) , G. Marchiori (3) , I. Nikolic-Audit (3) , J. Ocariz (3) , S. Pires (3) , M. Ridel (3) , L. Roos (3) , S. Trincaz-Duvoid (3) , F. Vannucci (3) , D. Varouchas (3) , H. Bachaou (4) , F. Balli (4) , F. Bauer (4) , N. Besson (4) , J.-B. Blanchard (4) , M. Boonekamp (4) , A. Calandri (4) , L. Chevalier (4) , M. Dano Hoffmann (4) , F. Deliot (4) , J. Ernwein (4) , A.I. Etienvre (4) , A. Formica (4) , P.F. Giraud (4) , J. Goncalves Pinto Firmino da Costa (4) , H.M.X. Grabas (4) , C. Guyot (4) , R. Hanna (4) , S. Hassani (4) , W. Kozanecki (4) , E. Lancon (4) , J.F. Laporte (4) , C. Maiani (4) , P. Mal (4) , B. Mansoulie (4) , H. Martinez (4) , N. Meric (4) , J.-P. Meyer (4) , R. Nicolaidou (4) , A. Ouraou (4) , E. Protopapadaki (4) , C.R. Royon (4) , L.L. Schoffel (4) , Ph. Schune (4) , Ph. Schwemling (4) , J. Schwindling (4) , D. Tsionou (4) , N. Vranjes (4) , M. Xiao (4) , G. Rahal (5) , N. Berger (6) , M. Delmastro (6) , L. Di Ciaccio (6) , T.K.O. Doan (6) , S. Elles (6) , C. Goy (6) , T. Hryn'Ova (6) , S. Jézéquel (6) , H. Keoshkerian (6) , I. Koletsou (6) , R. Lafaye (6) , J. Leveque (6) , V.P. Lombardo (6) , N. Massol (6) , H. Przysiezniak (6) , G. Sauvage (6) , E. Sauvan (6) , M. Schwoerer (6) , O. Simard (6) , T. Todorov (6) , I. Wingerter-Seez (6) , S. Abdel Khalek (7) , A. Bassalat (7) , C. Becot (7) , S. Binet (7) , C. Bourdarios (7) , D. Charfeddine (7) , J.B. de Vivie de Regie (7) , L. Duflot (7) , M. Escalier (7) , L. Fayard (7) , D. Fournier (7) , J.-F. Grivaz (7) , T. Guillemin (7) , F. Hariri (7) , S. Henrot-Versillé (7) , J. Hrivnac (7) , L. Iconomidou-Fayard (7) , M. Kado (7) , A. Lounis (7) , N. Makovec (7) , L. Poggioli (7) , P. Puzo (7) , A. Renaud (7) , D. Rousseau (7) , G. Rybkin (7) , A.C. Schaffer (7) , E. Scifo (7) , L. Serin (7) , S. Simion (7) , R. Tanaka (7) , H.L. Tran (7) , D. Zerwas (7) , Zhiqing Zhang (7) , S. Albrand (8) , J. Brown (8) , J. Collot (8) , S. Crépé-Renaudin (8) , B. Dechenaux (8) , P.A. Delsart (8) , C. Gabaldon (8) , M.H. Genest (8) , J.Y. Hostachy (8) , B.T. Le (8) , F. Ledroit-Guillon (8) , A. Lleres (8) , A. Lucotte (8) , F. Malek (8) , C. Monini (8) , J. Stark (8) , B. Trocmé (8) , M. Wu (8)

1 CPPM - Centre de Physique des Particules de Marseille
2 LPC - Laboratoire de Physique Corpusculaire - Clermont-Ferrand
3 LPNHE - Laboratoire de Physique Nucléaire et de Hautes Énergies
4 IRFU - Institut de Recherches sur les lois Fondamentales de l'Univers
5 CC-IN2P3 - Centre de Calcul de l'IN2P3
6 LAPP - Laboratoire d'Annecy de Physique des Particules
7 LAL - Laboratoire de l'Accélérateur Linéaire
8 LPSC - Laboratoire de Physique Subatomique et de Cosmologie

This paper presents a search for new particles in events with one lepton (electron or muon) and missing transverse momentum using 20.3 $fb^{-1}$ of proton-proton collision data at $\sqrt{s}=8$ TeV recorded by the ATLAS experiment at the Large Hadron Collider. No significant excess beyond Standard Model expectations is observed. A $W'$ with Sequential Standard Model couplings is excluded at the 95% confidence level for masses up to 3.24 TeV. Excited chiral bosons ($W^{*}$) with equivalent coupling strengths are excluded for masses up to 3.21 TeV. In the framework of an effective field theory limits are also set on the dark matter-nucleon scattering cross-section as well as the mass scale $M_{*}$ of the unknown mediating interaction for dark matter pair production in association with a leptonically decaying $W$.

Domaines: Physique des Hautes Energies - Expérience [hep-ex]

G. Aad, L. Alio, M. Barbero, C. Bertella, J.C. Clémens, et al.. Search for new particles in events with one lepton and missing transverse momentum in $pp$ collisions at $\sqrt{s}$ = 8 TeV with the ATLAS detector. Journal of High Energy Physics, 2014, 09, pp.037. ⟨10.1007/JHEP09(2014)037⟩. ⟨in2p3-01052862⟩