Search for supersymmetry in final states with two same-sign or three leptons and jets using 36 fb(-1) of root&ITs&IT = 13 TeV &ITpp&IT collision data with the ATLAS detector

Journal of High Energy Physics Springer 2017:9 (2017) 84

Authors:

M Aaboud, G Aad, B Abbott, Giacomo Artoni, Alan Barr, Anne K Becker, Amanda Cooper-Sarkar, Lydia Beresford, Elizabeth Gallas, Daniela Bortoletto, Christopher Hays, Francesco Giuli, Luigi Marchese, Claire Gwenlan, Richard Nickerson, Cigdem Issever, Brian Huffman, James Frost, Georg Viehhauser, Jeffrey Tseng, Koichi Nagai, Ian Shipsey, Jesse Liu, Gabia Zemaityte, AR Weidberg, ME Nelson, The ATLAS collaboration

Abstract:

A search for strongly produced supersymmetric particles using signatures involving multiple energetic jets and either two isolated same-sign leptons (e or μ), or at least three isolated leptons, is presented. The analysis relies on the identification of b-jets and high missing transverse momentum to achieve good sensitivity. A data sample of proton-proton collisions at s√=13 TeV recorded with the ATLAS detector at the Large Hadron Collider in 2015 and 2016, corresponding to a total integrated luminosity of 36.1 fb−1, is used for the search. No significant excess over the Standard Model prediction is observed. The results are interpreted in several simplified supersymmetric models featuring R-parity conservation or R-parity violation, extending the exclusion limits from previous searches. In models considering gluino pair production, gluino masses are excluded up to 1.87 TeV at 95% confidence level. When bottom squarks are pair-produced and decay to a chargino and a top quark, models with bottom squark masses below 700 GeV and light neutralinos are excluded at 95% confidence level. In addition, model-independent limits are set on a possible contribution of new phenomena to the signal region yields.

Cherenkov Telescope Array Contributions to the 35th International Cosmic Ray Conference (ICRC2017)

(2017)

Authors:

F Acero, BS Acharya, V Acín Portella, C Adams, I Agudo, F Aharonian, I Al Samarai, A Alberdi, M Alcubierre, R Alfaro, J Alfaro, C Alispach, R Aloisio, R Alves Batista, J-P Amans, E Amato, L Ambrogi, G Ambrosi, M Ambrosio, J Anderson, M Anduze, EO Angüner, E Antolini, LA Antonelli, V Antonuccio, P Antoranz, C Aramo, M Araya, C Arcaro, T Armstrong, F Arqueros, L Arrabito, M Arrieta, K Asano, A Asano, M Ashley, P Aubert, CB Singh, A Babic, M Backes, S Bajtlik, C Balazs, M Balbo, O Ballester, J Ballet, L Ballo, A Balzer, A Bamba, R Bandiera, P Barai, C Barbier, M Barcelo, M Barkov, U Barres de Almeida, JA Barrio, D Bastieri, C Bauer, U Becciani, Y Becherini, J Becker Tjus, W Bednarek, A Belfiore, W Benbow, M Benito, D Berge, E Bernardini, MG Bernardini, M Bernardos, S Bernhard, K Bernlöhr, C Bertinelli Salucci, B Bertucci, M-A Besel, V Beshley, J Bettane, N Bhatt, W Bhattacharyya, S Bhattachryya, B Biasuzzi, G Bicknell, C Bigongiari, A Biland, A Bilinsky, R Bird, E Bissaldi, J Biteau, M Bitossi, O Blanch, P Blasi, J Blazek, C Boccato, C Bockermann, C Boehm, M Bohacova, C Boisson, J Bolmont, G Bonanno, A Bonardi, C Bonavolontà, G Bonnoli, J Borkowski, R Bose, Z Bosnjak, M Böttcher, C Boutonnet, F Bouyjou, L Bowman, V Bozhilov, C Braiding, S Brau-Nogué, J Bregeon, M Briggs, A Brill, W Brisken, D Bristow, R Britto, E Brocato, AM Brown, S Brown, K Brügge, P Brun, P Brun, F Brun, L Brunetti, G Brunetti, P Bruno, M Bryan, J Buckley, V Bugaev, R Bühler, A Bulgarelli, T Bulik, M Burton, A Burtovoi, G Busetto, S Buson, J Buss, K Byrum, A Caccianiga, R Cameron, F Canelli, R Canestrari, M Capalbi, M Capasso, F Capitanio, A Caproni, R Capuzzo-Dolcetta, P Caraveo, V Cárdenas, J Cardenzana, M Cardillo, C Carlile, S Caroff, R Carosi, A Carosi, E Carquín, J Carr, J-M Casandjian, S Casanova, E Cascone, AJ Castro-Tirado, J Castroviejo Mora, F Catalani, O Catalano, D Cauz, C Celestino Silva, S Celli, M Cerruti, E Chabanne, P Chadwick, N Chakraborty, C Champion, A Chatterjee, S Chaty, R Chaves, A Chen, X Chen, K Cheng, M Chernyakova, M Chikawa, VR Chitnis, A Christov, J Chudoba, M Cieślar, P Clark, V Coco, S Colafrancesco, P Colin, E Colombo, J Colome, S Colonges, V Conforti, V Connaughton, J Conrad, JL Contreras, R Cornat, J Cortina, A Costa, H Costantini, G Cotter, B Courty, S Covino, G Covone, P Cristofari, SJ Criswell, R Crocker, J Croston, C Crovari, J Cuadra, O Cuevas, X Cui, P Cumani, G Cusumano, A D'Aì, F D'Ammando, P D'Avanzo, D D'Urso, P Da Vela, Ø Dale, VT Dang, L Dangeon, M Daniel, I Davids, B Dawson, F Dazzi, A De Angelis, V De Caprio, R de Cássia dos Anjos, G De Cesare, A De Franco, F De Frondat, EM de Gouveia Dal Pino, I de la Calle, C De Lisio, R de los Reyes Lopez, B De Lotto, A De Luca, M De Lucia, JRT de Mello Neto, M de Naurois, E de Oña Wilhelmi, F De Palma, F De Persio, V de Souza, J Decock, C Deil, P Deiml, M Del Santo, E Delagnes, G Deleglise, M Delfino Reznicek, C Delgado, J Delgado Mengual, R Della Ceca, D della Volpe, M Detournay, J Devin, T Di Girolamo, C Di Giulio, F Di Pierro, L Di Venere, L Diaz, C Díaz, C Dib, H Dickinson, S Diebold, S Digel, A Djannati-Ataï, M Doert, A Domínguez, D Dominis Prester, I Donnarumma, D Dorner, M Doro, J-L Dournaux, T Downes, G Drake, S Drappeau, H Drass, D Dravins, L Drury, G Dubus, K Dundas Morå, A Durkalec, V Dwarkadas, J Ebr, C Eckner, E Edy, K Egberts, S Einecke, J Eisch, F Eisenkolb, TRN Ekoume, C Eleftheriadis, D Elsässer, D Emmanoulopoulos, J-P Ernenwein, P Escarate, S Eschbach, C Espinoza, P Evans, C Evoli, M Fairbairn, D Falceta-Goncalves, A Falcone, V Fallah Ramazani, K Farakos, E Farrell, G Fasola, Y Favre, E Fede, R Fedora, E Fedorova, S Fegan, M Fernandez-Alonso, A Fernández-Barral, G Ferrand, O Ferreira, M Fesquet, E Fiandrini, A Fiasson, M Filipovic, D Fink, JP Finley, C Finley, A Finoguenov, V Fioretti, M Fiorini, H Flores, L Foffano, C Föhr, MV Fonseca, L Font, G Fontaine, M Fornasa, P Fortin, L Fortson, N Fouque, B Fraga, FJ Franco, L Freixas Coromina, C Fruck, D Fugazza, Y Fujita, S Fukami, Y Fukazawa, Y Fukui, S Funk, A Furniss, M Füßling, S Gabici, A Gadola, Y Gallant, D Galloway, S Gallozzi, B Garcia, A Garcia, R García Gil, R Garcia López, M Garczarczyk, D Gardiol, F Gargano, C Gargano, S Garozzo, M Garrido-Ruiz, D Gascon, T Gasparetto, F Gaté, M Gaug, B Gebhardt, M Gebyehu, N Geffroy, B Genolini, A Ghalumyan, A Ghedina, G Ghirlanda, P Giammaria, F Gianotti, B Giebels, N Giglietto, V Gika, R Gimenes, P Giommi, F Giordano, G Giovannini, E Giro, M Giroletti, J Gironnet, A Giuliani, J-F Glicenstein, R Gnatyk, N Godinovic, P Goldoni, JL Gómez, G Gómez-Vargas, MM González, JM González, KS Gothe, D Gotz, J Goullon, T Grabarczyk, R Graciani, J Graham, P Grandi, J Granot, G Grasseau, R Gredig, AJ Green, T Greenshaw, I Grenier, S Griffiths, A Grillo, M-H Grondin, J Grube, V Guarino, B Guest, O Gueta, S Gunji, G Gyuk, D Hadasch, L Hagge, J Hahn, A Hahn, H Hakobyan, S Hara, MJ Hardcastle, T Hassan, T Haubold, A Haupt, K Hayashi, M Hayashida, H He, M Heller, JC Helo, F Henault, G Henri, G Hermann, R Hermel, J Herrera Llorente, A Herrero, O Hervet, N Hidaka, J Hinton, N Hiroshima, K Hirotani, B Hnatyk, JK Hoang, D Hoffmann, W Hofmann, J Holder, D Horan, J Hörandel, M Hörbe, D Horns, P Horvath, J Houles, T Hovatta, M Hrabovsky, D Hrupec, J-M Huet, G Hughes, D Hui, G Hull, TB Humensky, M Hussein, M Hütten, M Iarlori, Y Ikeno, JM Illa, D Impiombato, T Inada, A Ingallinera, Y Inome, S Inoue, T Inoue, Y Inoue, F Iocco, K Ioka, M Ionica, M Iori, A Iriarte, K Ishio, GL Israel, Y Iwamura, C Jablonski, A Jacholkowska, J Jacquemier, M Jamrozy, P Janecek, F Jankowsky, D Jankowsky, P Jansweijer, C Jarnot, P Jean, CA Johnson, M Josselin, I Jung-Richardt, J Jurysek, P Kaaret, P Kachru, M Kagaya, J Kakuwa, O Kalekin, R Kankanyan, A Karastergiou, M Karczewski, S Karkar, H Katagiri, J Kataoka, K Katarzyński, U Katz, N Kawanaka, L Kaye, D Kazanas, N Kelley-Hoskins, B Khélifi, DB Kieda, T Kihm, S Kimeswenger, S Kimura, S Kisaka, S Kishida, R Kissmann, W Kluźniak, J Knapen, J Knapp, J Knödlseder, B Koch, J Kocot, K Kohri, N Komin, A Kong, Y Konno, K Kosack, G Kowal, S Koyama, M Kraus, M Krause, F Krauß, F Krennrich, P Kruger, H Kubo, V Kudryavtsev, G Kukec Mezek, S Kumar, H Kuroda, J Kushida, P Kushwaha, N La Palombara, V La Parola, G La Rosa, R Lahmann, K Lalik, G Lamanna, M Landoni, D Landriu, H Landt, RG Lang, J Lapington, P Laporte, O Le Blanc, T Le Flour, P Le Sidaner, S Leach, A Leckngam, S-H Lee, WH Lee, J-P Lees, J Lefaucheur, MA Leigui de Oliveira, M Lemoine-Goumard, J-P Lenain, G Leto, R Lico, M Limon, R Lindemann, E Lindfors, L Linhoff, A Lipniacka, S Lloyd, T Lohse, S Lombardi, F Longo, M Lopez, R Lopez-Coto, T Louge, F Louis, M Louys, F Lucarelli, D Lucchesi, PL Luque-Escamilla, E Lyard, MC Maccarone, T Maccarone, E Mach, GM Madejski, G Maier, A Majczyna, P Majumdar, M Makariev, G Malaguti, A Malouf, S Maltezos, D Malyshev, D Malyshev, D Mandat, G Maneva, M Manganaro, S Mangano, P Manigot, K Mannheim, N Maragos, D Marano, A Marcowith, J Marín, M Mariotti, M Marisaldi, S Markoff, J Martí, J-M Martin, P Martin, L Martin, M Martínez, G Martínez, O Martínez, R Marx, N Masetti, P Massimino, A Mastichiadis, M Mastropietro, S Masuda, H Matsumoto, N Matthews, S Mattiazzo, G Maurin, N Maxted, M Mayer, D Mazin, MN Mazziotta, L Mc Comb, I McHardy, C Medina, A Melandri, C Melioli, D Melkumyan, S Mereghetti, J-L Meunier, T Meures, M Meyer, S Micanovic, T Michael, J Michałowski, I Mievre, J Miller, IA Minaya, T Mineo, F Mirabel, JM Miranda, R Mirzoyan, A Mitchell, T Mizuno, R Moderski, M Mohammed, L Mohrmann, C Molijn, E Molinari, R Moncada, T Montaruli, I Monteiro, D Mooney, P Moore, A Moralejo, D Morcuende-Parrilla, E Moretti, K Mori, G Morlino, P Morris, A Morselli, F Moscato, D Motohashi, E Moulin, S Mueller, R Mukherjee, P Munar, C Mundell, J Mundet, T Murach, H Muraishi, K Murase, A Murphy, A Nagai, N Nagar, S Nagataki, T Nagayoshi, BK Nagesh, T Naito, D Nakajima, T Nakamori, Y Nakamura, K Nakayama, D Naumann, P Nayman, D Neise, L Nellen, R Nemmen, A Neronov, N Neyroud, T Nguyen, TT Nguyen, T Nguyen Trung, L Nicastro, J Nicolau-Kukliński, J Niemiec, D Nieto, M Nievas-Rosillo, M Nikołajuk, K Nishijima, K-I Nishikawa, G Nishiyama, K Noda, L Nogues, S Nolan, D Nosek, M Nöthe, B Novosyadlyj, S Nozaki, F Nunio, P O'Brien, L Oakes, C Ocampo, JP Ochoa, R Oger, Y Ohira, M Ohishi, S Ohm, N Okazaki, A Okumura, J-F Olive, RA Ong, M Orienti, R Orito, A Orlati, JP Osborne, M Ostrowski, N Otte, Z Ou, E Ovcharov, I Oya, A Ozieblo, M Padovani, S Paiano, A Paizis, J Palacio, M Palatiello, M Palatka, J Pallotta, J-L Panazol, D Paneque, M Panter, R Paoletti, M Paolillo, A Papitto, A Paravac, JM Paredes, G Pareschi, RD Parsons, P Paśko, S Pavy, A Pe'er, M Pech, G Pedaletti, P Peñil Del Campo, A Perez, MA Pérez-Torres, L Perri, M Perri, M Persic, A Petrashyk, S Petrera, P-O Petrucci, O Petruk, B Peyaud, M Pfeifer, G Piano, Q Piel, D Pieloth, F Pintore, C Pio García, A Pisarski, S Pita, L Pizarro, Ł Platos, M Pohl, V Poireau, A Pollo, J Porthault, J Poutanen, D Pozo, E Prandini, P Prasit, J Prast, K Pressard, G Principe, D Prokhorov, H Prokoph, M Prouza, G Pruteanu, E Pueschel, G Pühlhofer, I Puljak, M Punch, S Pürckhauer, F Queiroz, J Quinn, A Quirrenbach, I Rafighi, S Rainò, PJ Rajda, R Rando, RC Rannot, S Razzaque, I Reichardt, O Reimer, A Reimer, A Reisenegger, M Renaud, T Reposeur, B Reville, AH Rezaeian, W Rhode, D Ribeiro, M Ribó, MG Richer, T Richtler, J Rico, F Rieger, M Riquelme, PR Ristori, S Rivoire, V Rizi, J Rodriguez, G Rodriguez Fernandez, JJ Rodríguez Vázquez, G Rojas, P Romano, G Romeo, M Roncadelli, J Rosado, S Rosen, S Rosier Lees, J Rousselle, AC Rovero, G Rowell, B Rudak, A Rugliancich, JE Ruíz del Mazo, W Rujopakarn, C Rulten, F Russo, O Saavedra, S Sabatini, B Sacco, I Sadeh, E Sæther Hatlen, S Safi-Harb, V Sahakian, S Sailer, T Saito, N Sakaki, S Sakurai, D Salek, F Salesa Greus, G Salina, D Sanchez, M Sánchez-Conde, H Sandaker, A Sandoval, P Sangiorgi, M Sanguillon, H Sano, M Santander, A Santangelo, EM Santos, A Sanuy, L Sapozhnikov, S Sarkar, K Satalecka, Y Sato, FG Saturni, R Savalle, M Sawada, S Schanne, EJ Schioppa, S Schlenstedt, T Schmidt, J Schmoll, M Schneider, H Schoorlemmer, P Schovanek, A Schulz, F Schussler, U Schwanke, J Schwarz, T Schweizer, S Schwemmer, E Sciacca, S Scuderi, M Seglar-Arroyo, A Segreto, I Seitenzahl, D Semikoz, O Sergijenko, N Serre, M Servillat, K Seweryn, K Shah, A Shalchi, M Sharma, RC Shellard, I Shilon, L Sidoli, M Sidz, H Siejkowski, J Silk, A Sillanpää, D Simone, BB Singh, G Sironi, J Sitarek, P Sizun, V Sliusar, A Slowikowska, A Smith, D Sobczyńska, A Sokolenko, H Sol, G Sottile, W Springer, O Stahl, A Stamerra, S Stanič, R Starling, D Staszak, Ł Stawarz, R Steenkamp, S Stefanik, C Stegmann, S Steiner, C Stella, M Stephan, R Sternberger, M Sterzel, B Stevenson, M Stodulska, M Stodulski, T Stolarczyk, G Stratta, U Straumann, R Stuik, M Suchenek, T Suomijarvi, AD Supanitsky, T Suric, I Sushch, P Sutcliffe, J Sykes, M Szanecki, T Szepieniec, G Tagliaferri, H Tajima, K Takahashi, H Takahashi, M Takahashi, L Takalo, S Takami, J Takata, J Takeda, T Tam, M Tanaka, T Tanaka, Y Tanaka, S Tanaka, C Tanci, M Tavani, F Tavecchio, J-P Tavernet, K Tayabaly, LA Tejedor, F Temme, P Temnikov, Y Terada, JC Terrazas, R Terrier, D Terront, T Terzic, D Tescaro, M Teshima, V Testa, S Thoudam, W Tian, L Tibaldo, A Tiengo, D Tiziani, M Tluczykont, CJ Todero Peixoto, F Tokanai, M Tokarz, K Toma, J Tomastik, A Tonachini, D Tonev, M Tornikoski, DF Torres, E Torresi, G Tosti, T Totani, N Tothill, F Toussenel, G Tovmassian, N Trakarnsirinont, P Travnicek, C Trichard, M Trifoglio, I Troyano Pujadas, M Tsirou, S Tsujimoto, T Tsuru, Y Uchiyama, G Umana, M Uslenghi, V Vagelli, F Vagnetti, M Valentino, P Vallania, L Valore, AM Van den Berg, W van Driel, C van Eldik, B van Soelen, J Vandenbroucke, J Vanderwalt, GS Varner, G Vasileiadis, V Vassiliev, JR Vázquez, M Vázquez Acosta, M Vecchi, A Vega, P Veitch, P Venault, C Venter, S Vercellone, P Veres, S Vergani, V Verzi, GP Vettolani, C Veyssiere, A Viana, J Vicha, C Vigorito, J Villanueva, P Vincent, J Vink, F Visconti, V Vittorini, H Voelk, V Voisin, A Vollhardt, S Vorobiov, I Vovk, M Vrastil, T Vuillaume, SJ Wagner, R Wagner, P Wagner, SP Wakely, T Walstra, R Walter, M Ward, JE Ward, D Warren, JJ Watson, N Webb, P Wegner, O Weiner, A Weinstein, C Weniger, F Werner, H Wetteskind, M White, R White, A Wierzcholska, S Wiesand, R Wijers, P Wilcox, A Wilhelm, M Wilkinson, M Will, DA Williams, M Winter, P Wojcik, D Wolf, M Wood, A Wörnlein, T Wu, KK Yadav, C Yaguna, T Yamamoto, H Yamamoto, N Yamane, R Yamazaki, S Yanagita, L Yang, D Yelos, T Yoshida, M Yoshida, S Yoshiike, T Yoshikoshi, P Yu, D Zaborov, M Zacharias, G Zaharijas, A Zajczyk, L Zampieri, F Zandanel, R Zanin, R Zanmar Sanchez, D Zaric, M Zavrtanik, D Zavrtanik, AA Zdziarski, A Zech, H Zechlin, VI Zhdanov, A Ziegler, J Ziemann, K Ziętara, A Zink, J Ziółkowski, V Zitelli, A Zoli, J Zorn

Search for astrophysical sources of neutrinos using cascade events in IceCube

Astrophysical Journal American Astronomical Society 846:2 (2017) 1-12

Authors:

M Ackermann, J Adams, Subir Sarkar

Abstract:

The IceCube neutrino observatory has established the existence of a flux of high-energy astrophysical neutrinos, which is inconsistent with the expectation from atmospheric backgrounds at a significance greater than 5σ. This flux has been observed in analyses of both track events from muon neutrino interactions and cascade events from interactions of all neutrino flavors. Searches for astrophysical neutrino sources have focused on track events due to the significantly better angular resolution of track reconstructions. To date, no such sources have been confirmed. Here we present the first search for astrophysical neutrino sources using cascades interacting in IceCube with deposited energies as small as 1 TeV. No significant clustering was observed in a selection of 263 cascades collected from 2010 May to 2012 May. We show that compared to the classic approach using tracks, this statistically independent search offers improved sensitivity to sources in the southern sky, especially if the emission is spatially extended or follows a soft energy spectrum. This enhancement is due to the low background from atmospheric neutrinos forming cascade events and the additional veto of atmospheric neutrinos at declinations ≲-30.

Search for new phenomena in dijet events using 37 fb^−1 of pp collision data collected at √s = 13 TeV with the ATLAS detector.

Physical Review D American Physical Society 96:5 (2017) 052004

Authors:

M Aaboud, G Aad, B Abbott, Giacomo Artoni, Moritz Backes, Alan J Barr, A Kathrin Becker, Lydia Beresford, Daniela Bortoletto, Jonathan Burr, Amanda M Cooper-Sarkar, WIlliam J Fawcett, James A Frost, Francesco Giuli, Claire Gwenlan, Christopher P Hays, Cigdem Issever, Koichi Nagai, Richard B Nickerson, Nurfikri Norjoharuddeen, Mariyan Petrov, Mark A Pickering, Ian PJ Shipsey, Jeffrey C-L Tseng, Georg HA Viehhauser

Abstract:

Dijet events are studied in the proton-proton collision data set recorded at √s = 13 TeV with the ATLAS detector at the Large Hadron Collider in 2015 and 2016, corresponding to integrated luminosities of 3.5 fb^−1 and 33.5 fb^−1 respectively. Invariant mass and angular distributions are compared to background predictions and no significant deviation is observed. For resonance searches, a new method for fitting the background component of the invariant mass distribution is employed. The data set is then used to set upper limits at a 95% confidence level on a range of new physics scenarios. Excited quarks with masses below 6.0 TeV are excluded, and limits are set on quantum black holes, heavy W' bosons, W* bosons, and a range of masses and couplings in a Z' dark matter mediator model. Model-independent limits on signals with a Gaussian shape are also set, using a new approach allowing factorization of physics and detector effects. From the angular distributions, a scale of new physics in contact interaction models is excluded for scenarios with either constructive or destructive interference. These results represent a substantial improvement over those obtained previously with lower integrated luminosity.

Axion driven cosmic magneto-genesis during the QCD crossover

(2017)

Authors:

Francesco Miniati, Gianluca Gregori, Brian Reville, Subir Sarkar