Search for nucleon decay into lepton+K{sup 0} final states using Soudan 2

Journal Article · Sat Apr 01 04:00:00 EST 2000 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PhysRevD.61.072004· OSTI ID:20215949

Wall, D ^[1]; Allison, W W. M. ^[2]; Alner, G J ^[3]; Ayres, D S ^[4]; Barrett, W L ^[5]; Bode, C ^[6]; Border, P M ^[6]; Brooks, C B ^[2]; Cobb, J H ^[2]; Cotton, R ^[3]

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1. Tufts University, Medford, Massachusetts 02155 (United States)
2. Department of Physics, University of Oxford, Oxford OX1 3RH, (United Kingdom)
3. Rutherford Appleton Laboratory, Chilton, Didcot, Oxfordshire OX11 0QX, (United Kingdom)
4. Argonne National Laboratory, Argonne, Illinois 60439 (United States)
5. Western Washington University, Bellingham, Washington 98225 (United States)
6. University of Minnesota, Minneapolis, Minnesota 55455 (United States)

A search for nucleon decay into two-body final states containing K{sup 0} mesons has been conducted using the 963 metric ton Soudan 2 iron tracking calorimeter. The topologies, ionizations, and kinematics of contained events recorded in a 5.52 kiloton-year total exposure (4.41 kton-year fiducial volume exposure) are examined for compatibility with nucleon decays in an iron medium. For proton decay into the fully visible final states {mu}{sup +}K{sub S}{sup 0} and e{sup +}K{sub S}{sup 0}, zero and one event candidates are observed respectively. The lifetime lower limits ({tau}/B) thus implied are 1.5x10{sup 32} yr and 1.2x10{sup 32} yr, respectively. Lifetime lower limits are also reported for proton decay into l{sup +}K{sub l}{sup 0}, and for neutron decay into {nu}K{sub S}{sup 0}. (c) 2000 The American Physical Society.

• Research Organization: Argonne National Laboratory (ANL), Argonne, IL
• OSTI ID: 20215949
• Journal Information: Physical Review. D, Particles Fields, Journal Name: Physical Review. D, Particles Fields Journal Issue: 7 Vol. 61; ISSN PRVDAQ; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
BARYONS
CALORIMETRY
EXPERIMENTAL DATA
KAONS NEUTRAL
LIFETIME
MUONS PLUS
POSITRONS
SEMILEPTONIC DECAY
SUPERSYMMETRY