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“…Several models beyond the Standard Model predict new particles which could have a significant lifetime owing to the mass-degeneracy, heavy intermediate particles or small coupling to the lighter particles. When such a long-lived particle decays far from a beam collision point, it is hard for standard event reconstruction targeting promptly decaying signals to detect it, in spite of the fact that a long-lived particle would leave characteristric signature in the detector. …”
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“…The present document focuses on the recent searches for the existence of heavy particles beyond the Standard Model at LHCb, exploiting its unique forward acceptance, high-precision tracking and excellent particle identification. Searches for long-lived particles decaying into jet pairs or semileptonically, together with the lepton-flavour-violating decays of Higgs-like boson, are discussed.…”
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“…Several models beyond the Standard Model predict new particles which could have a significant lifetime owing to the mass-degeneracy, heavy intermediate particles or small coupling to the lighter particles. When such a long-lived particle decays far from a beam collision point, it is hard for standard event reconstruction targeting promptly decaying signals to detect it, in spite of the fact that a long-lived particle would leave a characteristic signature in the detector. …”
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“…Long-lived particles (LLPs) are an important possibility to be aware of when searching for physics beyond the standard model, as there is no a priori reason for any undiscovered particle byond the standard model (BSM) to have such a short lifetime as to decay promptly. …”
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“…Discussion of new communication technologies that have either already had a huge impact in our lives or will do so in the future (5 pages).…”
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“…We analyse the MSSM parameter space and discuss the narrow band near the so-called co-annihilation region where sleptons may be long-lived particles. This region is consistent with the WMAP restrictions on the Dark matter and depends on the value of $\tan\beta$. …”
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“…Three searches are presented for long-lived particles with specific production and decay features: pairs of long-lived particles from Higgs boson decay and decaying either to jet pairs or to three quarks, and long-lived particles decaying semileptonically. …”
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“…Many extensions of the Standard Model (SM) include particles that are neutral, weakly coupled, and long-lived that can decay to final states containing several hadronic jets. …”
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