DOE OSTI · 3377510
High Multiplicity Trigger for long-lived particles in CMS detector
Abstract
Searches for long-lived particles (LLPs) at the CMS experiment often involve unconventional event topologies that are difficult to efficiently select using standard trigger strategies. To improve sensitivity to such signatures during LHC Run 3 operation, a dedicated High Multiplicity Trigger (HMT) has been developed and deployed in the CMS trigger system. The trigger targets events containing unusually large numbers of hits in the CMS cathode strip chamber (CSC) muon detectors, a characteristic signature of several LLP scenarios involving displaced decays in the muon system. The HMT implementation, trigger logic, rate dependence with pileup, and operational stability are described. Optimized hit multiplicity thresholds are used to maintain acceptable trigger rates under high-luminosity and high-pileup conditions while preserving high efficiency across a broad range of LLP lifetimes and kinematic regimes. The trigger performance is evaluated using both simulated event samples and proton-proton collision data collected during Run 3 of the LHC. The HMT substantially extends the CMS sensitivity to non-standard signatures associated with LLP decays and provides a flexible platform for future searches for physics beyond the Standard Model.
Explore related subjects
Keep this discovery
Explore connections, maps & timelines
Abbott, M. [Univ. of California, Davis, CA (United States); et al.], Acosta, D. [Rice University, Houston,], Aebi, D. [Texas A&M University, College Station,], Ahmad, M. [Texas A&M University, College Station,], Albert, A. [California Institute of Technology, Pasadena,], Apresyan, A. [Fermi National Accelerator Laboratory, Batavia,], Arbour, C. [Rice University, Houston,], Aruta, C. [University of Florida, Gainesville,], Banicz, K. [Rice University, Houston,], Barashko, V. [University of Florida, Gainesville,], Barberis, E. [Northeastern University, Boston,], Benato, L. [Institute of High Energy Physics of the Austrian Academy of Sciences, Vienna,], Bolshov, A. [Texas A&M University, College Station,], Bonilla, J. [Northeastern University, Boston,], Breedon, R. [University of California, Davis, Davis,], Bunkowski, K. [Institute of Experimental Physics, Faculty of Physics, University of Warsaw, Warsaw,], Cai, H. [University of California, Davis, Davis,], Campagnari, C. [University of California, Santa Barbara, Santa Barbara,], Carlson, J. [University of California, Los Angeles,], Cherepanov, V. [University of Florida, Gainesville,], Chen, M. [Institute of High Energy Physics, Beijing,], Clare, R. [University of California, Riverside, Riverside,], Clark, R. [Northeastern University, Boston,], Cox, P.T. [University of California, Davis, Davis,], De Los Santos, R. [The Ohio State University, Columbus,], Dildick, S. [Rice University, Houston,], Dittrich, M. [University of Florida, Gainesville,], Dong, X. [Institute of High Energy Physics, Beijing,], Durkin, L.S. [The Ohio State University, Columbus,], Erbacher, R. [University of California, Davis, Davis,], Fernández Manteca, P. [CERN, European Organization for Nuclear Research, Geneva,], Flanagan, P. [Texas A&M University, College Station,], Fontanesi, E. [CERN, European Organization for Nuclear Research, Geneva,], Galloni, C. [University of Wisconsin-Madison, Madison, Wisconsin,], Gao, Y. [Texas A&M University, College Station,], Gilmore, J. [Texas A&M University, College Station,], Greshilov, A. [Rice University, Houston,], Haddad, Y. [Northeastern University, Boston,], Han, Y. [Northeastern University, Boston,], Hao, Z. [California Institute of Technology, Pasadena,], Hauser, J. [University of California, Los Angeles,], Hazen, E. [Boston University, Boston,], He, H. [University of Wisconsin-Madison, Madison, Wisconsin,], Heikkilae, J. [Riga Technical University, Riga,], Herndon, M. [University of Wisconsin-Madison, Madison, Wisconsin,], Hill, C. [The Ohio State University, Columbus,], Huang, T. [Rice University, Houston,], Ignatenko, M. [University of California, Los Angeles,], Iqbal, M.A. [University of California, Los Angeles,], Israr, I. [Northeastern University, Boston,], Jeitler, M. [Institute of High Energy Physics of the Austrian Academy of Sciences, Vienna,], Jindariani, S. [Fermi National Accelerator Laboratory, Batavia,], Juska, E. [Texas A&M University, College Station,], Kamon, T. [Texas A&M University, College Station,], Karjavine, V. [Authors affiliated with an institute or an international laboratory covered by a cooperation agreement with CERN], Kim, H. [Texas A&M University, College Station,; Seoul National University, Seoul,], Kim, J. [University of California, Santa Barbara, Santa Barbara,], Korytov, A. [University of Florida, Gainesville,], Kukral, O. [University of California, Davis, Davis,], Kwok, K.H.M. [University of Nebraska-Lincoln, Lincoln,], Kuznetsova, E. [University of Florida, Gainesville,], Liu, J. [Rice University, Houston,], Liu, W. [Institute of High Energy Physics, Beijing,], Lo, C. [University of California, Los Angeles,], Madorsky, A. [University of Florida, Gainesville,], Manganelli, N. [Northeastern University, Boston,], Matveev, M. [Rice University, Houston,], Mei, H. [University of California, Santa Barbara, Santa Barbara,], Menendez, N. [University of Florida, Gainesville,], Mitselmakher, G. [University of Florida, Gainesville,], Mocellin, G. [University of California, Davis, Davis,], Mondal, S. [University of Wisconsin-Madison, Madison, Wisconsin,], Morse, D.M. [Northeastern University, Boston,], Mulhearn, M. [University of California, Davis, Davis,], Padley, B.P. [Rice University, Houston,], Palichik, V. [Authors affiliated with an institute or an international laboratory covered by a cooperation agreement with CERN], Peck, A. [Boston University, Boston,], Pena, C. [Fermi National Accelerator Laboratory, Batavia,], Perelygin, V. [Authors affiliated with an institute or an international laboratory covered by a cooperation agreement with CERN], Rabady, D. [CERN, European Organization for Nuclear Research, Geneva,], Rawal, N. [University of Florida, Gainesville,], Richman, J. [University of California, Santa Barbara, Santa Barbara,], Safonov, A. [Texas A&M University, College Station,], Siddireddy, P. [University of California, Santa Barbara, Santa Barbara,], Spiropulu, M. [California Institute of Technology, Pasadena,], Suarez, I. [Boston University, Boston,], Terentyev, N. [University of Florida, Gainesville,], Tripathi, M. [University of California, Davis, Davis,], Turner, N. [University of California, Los Angeles,], Valuev, V. [University of California, Los Angeles,], Wang, C. [Fermi National Accelerator Laboratory, Batavia,], Wang, J. [University of Florida, Gainesville,], Wang, Y. [Institute of High Energy Physics, Beijing,], Wang, Z. [Institute of High Energy Physics, Beijing,], Wenzl, D. [The Ohio State University, Columbus,], Wood, D. [Northeastern University, Boston,], Xie, S. [California Institute of Technology, Pasadena,; Fermi National Accelerator Laboratory, Batavia,], Yang, X. [University of California, Los Angeles,], Yigitbasi, E. [Rice University, Houston,], Zhang, H. [Institute of High Energy Physics, Beijing,]. 2026-07-24. High Multiplicity Trigger for long-lived particles in CMS detector. https://doi.org/10.1088/1748-0221%2F21%2F07%2Fp07040
Cite the original work for its findings. Save a collection to share your selection of sources.