6533b7ddfe1ef96bd1275532
RESEARCH PRODUCT
Long-lived particles at the energy frontier: the MATHUSLA physics case
Michael E. PeskinTimothy CohenRaymond T. CoAndrew SprayJ. C. Arteaga-velázquezEmmanuel OlaiyaBrian ShuveBrian ShuveMarco DrewesCsaba CsákiYongchao ZhangYongchao ZhangSimon KnapenSimon KnapenRabindra N. MohapatraRouven EssigKaren S. Caballero-moraTony GherghettaBryan ZaldivarBryan ZaldivarJose Miguel NoJose Miguel NoJessie SheltonJuan Carlos HeloJuan Carlos HeloFrancesco D'eramoMatthias SchlafferAnson HookDavid PinnerDavid PinnerLuigi Delle RoseEung Jin ChunJared A. EvansJared A. EvansMatthias NeubertMatthias NeubertDavid MckeenPatrick MeadePhilip HarrisSunghoon JungRajat GuptaStephen M. WestMartin A. Subieta VasquezJeff A. DrorJeff A. DrorMaxim PospelovMaxim PospelovThomas FlackeElena AccomandoMatthew ReeceStefano MorettiStefano MorettiFelix YuAnthony FradetteDean J. RobinsonNatsumi NagataSeyda IpekArturo Fernandez TellezClaire H. Shepherd-themistocleousPeter CoxBrian BatellMartin HirschDavid CurtinStefan AntuschGilad PerezDmitry GorbunovKathryn M. ZurekKathryn M. ZurekKathryn M. ZurekRaman SundrumR. SantonicoCristiano AlpigianiZhen LiuAlejandro IbarraAlejandro IbarraAndrea ThammMario Rodriguez CahuantziYanou CuiJae Hyeok ChangLawrence J. HallLawrence J. HallEmiliano MolinaroHenry LubattiJason L. EvansOliver FischerGian F. GiudiceMartin BauerJose ZuritaNikita BlinovDaniel StolarskiBrock TweedieClaudia HagedornBrooks ThomasP. S. Bhupal DevYuhsin TsaiEric KuflikMatthew McculloughNathaniel CraigKeith R. DienesKeith R. DienesCharles YoungSalvator LombardoClaudia FrugiueleElina FuchsYonit Hochbergsubject
Physics::Instrumentation and DetectorsPhysics beyond the Standard ModelHEAVY MAJORANA NEUTRINOSGeneral Physics and Astronomy01 natural sciencesMathematical SciencesHigh Energy Physics - ExperimentHigh Energy Physics - Experiment (hep-ex)High Energy Physics - Phenomenology (hep-ph)NaturalnessCERN LHC Coll: upgrade[PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex]neutrino: masslong-lived particlesPhysicsLarge Hadron Collidernew physicsCMShierarchy problemneutrinosHierarchy problemhep-phATLASDARK-MATTER SEARCHESCOSMIC-RAYSmissing-energyHigh Energy Physics - PhenomenologyLarge Hadron ColliderPhysical SciencesNeutrinoLIGHT HIGGS-BOSONParticle Physics - ExperimentParticle physicsGeneral PhysicsSTERILE NEUTRINOSPHI-MESON DECAYSnucleosynthesis: big bangDark matterFOS: Physical sciencesEXTENSIVE AIR-SHOWERSdark matterVECTOR GAUGE BOSON0103 physical sciences010306 general physicsnumerical calculationsParticle Physics - PhenomenologyLEFT-RIGHT SYMMETRYMissing energyhep-exbackgroundBaryogenesisdark matter: detectortriggersensitivityBaryogenesis[PHYS.HPHE]Physics [physics]/High Energy Physics - Phenomenology [hep-ph]simplified modelsDOUBLE-BETA DECAYparticle: long-liveddescription
We examine the theoretical motivations for long-lived particle (LLP) signals at the LHC in a comprehensive survey of Standard Model (SM) extensions. LLPs are a common prediction of a wide range of theories that address unsolved fundamental mysteries such as naturalness, dark matter, baryogenesis and neutrino masses, and represent a natural and generic possibility for physics beyond the SM (BSM). In most cases the LLP lifetime can be treated as a free parameter from the $\mu$m scale up to the Big Bang Nucleosynthesis limit of $\sim 10^7$m. Neutral LLPs with lifetimes above $\sim$ 100m are particularly difficult to probe, as the sensitivity of the LHC main detectors is limited by challenging backgrounds, triggers, and small acceptances. MATHUSLA is a proposal for a minimally instrumented, large-volume surface detector near ATLAS or CMS. It would search for neutral LLPs produced in HL-LHC collisions by reconstructing displaced vertices (DVs) in a low-background environment, extending the sensitivity of the main detectors by orders of magnitude in the long-lifetime regime. In this white paper we study the LLP physics opportunities afforded by a MATHUSLA-like detector at the HL-LHC. We develop a model-independent approach to describe the sensitivity of MATHUSLA to BSM LLP signals, and compare it to DV and missing energy searches at ATLAS or CMS. We then explore the BSM motivations for LLPs in considerable detail, presenting a large number of new sensitivity studies. While our discussion is especially oriented towards the long-lifetime regime at MATHUSLA, this survey underlines the importance of a varied LLP search program at the LHC in general. By synthesizing these results into a general discussion of the top-down and bottom-up motivations for LLP searches, it is our aim to demonstrate the exceptional strength and breadth of the physics case for the construction of the MATHUSLA detector.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2019-11-01 |