Search for massive long-lived particles decaying semileptonically in the LHCb detector

LHCb Collaboration, R Aaij, Marco Adinolfi, John Benton, Emma Buchanan, Andrew Cook, Daniel Saunders, Sam Harnew, James Kariuki, Paras Naik, Konstantinos Petridis, Gabriela Pomery, Eugenia Price, Claire Prouve, Renato Quagliani, Jonas Rademacker, Sophie Richards, Daniel Saunders, Nicola Skidmore, Jaap Velthuis

Research output: Contribution to journalArticle (Academic Journal)peer-review

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A search is presented for massive long-lived particles
decaying into a muon and two quarks. The dataset
consists of proton-proton interactions at centre-of-mass energies
of 7 and 8 TeV, corresponding to integrated luminosities
of 1 and 2 fb−1, respectively. The analysis is performed
assuming a set of production mechanisms with simple topologies,
including the production of a Higgs-like particle decaying
into two long-lived particles. The mass range from 20
to 80 GeV/c2 and lifetimes from 5 to 100 ps are explored.
Results are also interpreted in terms of neutralino production
in different R-Parity violating supersymmetric models,
with masses in the 23–198 GeV/c2 range. No excess above
the background expectation is observed and upper limits are
set on the production cross-section for various points in the
parameter space of theoretical models.
Original languageEnglish
JournalEuropean Physical Journal C: Particles and Fields
Issue number224
Publication statusPublished - 10 Apr 2017


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