Measuring Lifetimes of Long-Lived Charged Massive Particles Stopped in LHC Detectors

Journal Article · Fri Oct 02 00:00:00 EDT 2009 · Physical Review Letters

DOI:https://doi.org/10.1103/PHYSREVLETT.103.141803· OSTI ID:21370714

Asai, Shoji; Shirai, Satoshi ^[1]; Hamaguchi, Koichi ^[1]

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1. Department of Physics, University of Tokyo, Tokyo 113-0033 (Japan)

Long-lived charged massive particles (CHAMPs) appear in various particle physics models beyond the standard model. In this Letter, we discuss the prospects for studying the stopping and decaying events of such long-lived CHAMPs at the LHC detectors, and show that the lifetime measurement (and the study of decay products) is possible with the LHC detectors for a wide range of the lifetime O(0.1)-O(10{sup 10}) sec, by using periods of no pp collision. Even a short lifetime of order 1 sec can be measured by (i) identifying the stopping event with the on-line event filter, (ii) immediately making a beam-dump signal which stops the pp collision of the LHC, and at the same time (iii) changing the trigger menu to optimize it for the detection of a CHAMP decay in the calorimeter. Other possibilities are also discussed.

• OSTI ID: 21370714
• Journal Information: Physical Review Letters, Vol. 103, Issue 14; Other Information: DOI: 10.1103/PhysRevLett.103.141803; (c) 2009 The American Physical Society; ISSN 0031-9007
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
CALORIMETERS
CERN LHC
DAUGHTER PRODUCTS
LIFETIME
PARTICLE DECAY
PROTON-PROTON INTERACTIONS
STANDARD MODEL
ACCELERATORS
BARYON-BARYON INTERACTIONS
CYCLIC ACCELERATORS
DECAY
FIELD THEORIES
GRAND UNIFIED THEORY
HADRON-HADRON INTERACTIONS
INTERACTIONS
ISOTOPES
MATHEMATICAL MODELS
MEASURING INSTRUMENTS
NUCLEON-NUCLEON INTERACTIONS
PARTICLE INTERACTIONS
PARTICLE MODELS
PROTON-NUCLEON INTERACTIONS
QUANTUM FIELD THEORY
STORAGE RINGS
SYNCHROTRONS
UNIFIED GAUGE MODELS