Dark sector searches with the CMS experiment
Aram Hayrapetyan, A. Tumasyan, W. Adam, Janik Walter Andrejkovic, T. Bergauer, S. Chatterjee, K. Damanakis, M. Dragicevic, Priya Sajid Hussain, M. Jeitler, Natascha Krammer, A. Li, D. Liko, I. Mikulec, J. Schieck, R. Schöfbeck, D. Schwarz, M. Sonawane, S. Templ, W. Waltenberger, C.-E. Wulz, M. R. Darwish, Janssen, Tahys, P. Van Mechelen, Nordin Breugelmans, J. D’Hondt, Soumya Dansana, A. De Moor, M. Delcourt, Felix Heyen, Steven Lowette, I. Makarenko, D. Müller, S. Tavernier, M. Tytgat, G. P. Van Onsem, S. Van Putte, D. Vannerom, B. Clerbaux, Aloke Kumar Das, G. De Lentdecker, Hugues Evard, L. Favart, P. Gianneios, D. Hohov, J. Jaramillo, Ali Khalilzadeh, Fakhri Alam Khan, K. Lee, M. Mahdavikhorrami, A. Malara, S. Paredes, Muhammad Aamir Shahzad, Laurent Thomas, M. Vanden Bemden, Catherine Vander Velde, P. Vanlaer, M. De Coen, D. Dobur, Gul Gokbulut, Yanwen Hong, J. Knolle, Luka Lambrecht, David Marckx, Gianny Mestdach, K. Mota Amarilo, Amrutha Samalan, K. Skovpen, N. Van Den Bossche, Jan van der Linden, Liam Wezenbeek, A. Benecke, A. Bethani, G. Bruno, C. Caputo, J. De Favereau De Jeneret, C. Delaere, I. S. Donertas, A. Giammanco, Ahmet Oguz Guzel, Jain, Sandhya, Vincent Lemaître, J. Lidrych, Paola Mastrapasqua, T. T. Tran, S. Wertz, G. A. Alves, M. Alves Gallo Pereira, E. Coelho, Gilson Correia Silva, C. Hensel, T. Menezes De Oliveira, A. Moraes, P. Rebello Teles, Soeiro, Mariana, A. Vilela Pereira, W. L. Aldá Júnior, M. Barroso Ferreira Filho, H. Malbouisson, W. Carvalho
Abstract
Astrophysical observations provide compelling evidence for gravitationally interacting dark matter in the universe that cannot be explained by the standard model of particle physics. The extraordinary amount of data from the CERN LHC presents a unique opportunity to shed light on the nature of dark matter at unprecedented collision energies. This Report comprehensively reviews the most recent searches with the CMS experiment for particles and interactions belonging to a dark sector and for dark-sector mediators. Models with invisible massive particles are probed by searches for signatures of missing transverse momentum recoiling against visible standard model particles. Searches for mediators are also conducted via fully visible final states. The results of these searches are compared with those obtained from direct-detection experiments. Searches for alternative scenarios predicting more complex dark sectors with multiple new particles and new forces are also presented. Many of these models include long-lived particles, which could manifest themselves with striking unconventional signatures with relatively small amounts of background. Searches for such particles are discussed and their impact on dark-sector scenarios is evaluated. Many results and interpretations have been newly obtained for this Report.