Search for nucleon decay into lepton+K-0 final states using Soudan 2 - art. no. 072004

Citation
D. Wall et al., Search for nucleon decay into lepton+K-0 final states using Soudan 2 - art. no. 072004, PHYS REV D, 6107(7), 2000, pp. 2004
Citations number
51
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Physics
Journal title
PHYSICAL REVIEW D
ISSN journal
0556-2821 → ACNP
Volume
6107
Issue
7
Year of publication
2000
Database
ISI
SICI code
0556-2821(20000401)6107:7<2004:SFNDIL>2.0.ZU;2-E
Abstract
A search for nucleon decay into two-body final states containing K-o mesons has been conducted using the 963 metric ton Soudan 2 iron tracking calorim eter. The topologies, ionizations, and kinematics of contained events recor ded in a 5.52 kiloton-year total exposure (4.41 kton-year fiducial volume e xposure) are examined for compatibility with nucleon decays in an iron medi um. For proton decay into the fully visible final states mu(+)K(S)(o) and e (+) K-S(o), zero and one event candidates are observed respectively. The li fetime lower limits (tau/B) thus implied are 1.5 x 10(32) yr and 1.2 x 10(3 2) yr, respectively. Lifetime lower limits are also reported for proton dec ay into l(+)K(l)(o), and for neutron decay into nu K-S(o).