Search for baryon-number and lepton-number violating decays of Λ hyperons using the CLAS detector at Jefferson Laboratory

McCracken, Michael E.

doi:10.1103/PhysRevD.92.072002

Title: Search for baryon-number and lepton-number violating decays of Λ hyperons using the CLAS detector at Jefferson Laboratory

Abstract

We present a search for ten baryon-number violating decay modes of Λ hyperons using the CLAS detector at Jefferson Laboratory. Nine of these decay modes result in a single meson and single lepton in the final state (Λ → mΙ) and conserve either the sum or the difference of baryon and lepton number (Β ± L). The tenth decay mode (Λ → p¯π⁺) represents a difference in baryon number of two units and no difference in lepton number. Furthermore, we observe no significant signal and set upper limits on the branching fractions of these reactions in the range (4 – 200) x 10⁷ at the 90% confidence level.

Authors:

McCracken, Michael E. ^[1]

Washington & Jefferson College, Washington, PA (United States); Carnegie Mellon Univ., Pittsburgh, PA (United States). et al.

Publication Date:: Fri Oct 09 00:00:00 EDT 2015

Research Org.:: Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)

Sponsoring Org.:: USDOE Office of Science (SC), High Energy Physics (HEP)

Contributing Org.:: CLAS Collaboration

OSTI Identifier:: 1222995

Alternate Identifier(s):: OSTI ID: 1223339

Report Number(s):: JLAB-PHY-15-2113; DOE/OR/23177-3478; arXiv:1507.03859
Journal ID: ISSN 1550-7998; FG02-87ER40315

Grant/Contract Number:: AC05-84ER40150; FG02-87ER40315

Resource Type:: Accepted Manuscript

Journal Name:: Physical Review. D, Particles, Fields, Gravitation and Cosmology

Additional Journal Information:: Journal Volume: 92; Journal Issue: 07; Related Information: JLab experiment number: E04-021; Journal ID: ISSN 1550-7998

Publisher:: American Physical Society (APS)

Country of Publication:: United States

Language:: English

Subject:: 46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS

Citation Formats


                    McCracken, Michael E. Search for baryon-number and lepton-number violating decays of Λ hyperons using the CLAS detector at Jefferson Laboratory.  United States: N. p., 2015. 
Web.  doi:10.1103/PhysRevD.92.072002.

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                    McCracken, Michael E. Search for baryon-number and lepton-number violating decays of Λ hyperons using the CLAS detector at Jefferson Laboratory.  United States.  https://doi.org/10.1103/PhysRevD.92.072002

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                    McCracken, Michael E. Fri .  
"Search for baryon-number and lepton-number violating decays of Λ hyperons using the CLAS detector at Jefferson Laboratory".  United States.  https://doi.org/10.1103/PhysRevD.92.072002.  https://www.osti.gov/servlets/purl/1222995.

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@article{osti_1222995,

  title        = {Search for baryon-number and lepton-number violating decays of Λ hyperons using the CLAS detector at Jefferson Laboratory},

  author       = {McCracken, Michael E.},

  abstractNote = {We present a search for ten baryon-number violating decay modes of Λ hyperons using the CLAS detector at Jefferson Laboratory. Nine of these decay modes result in a single meson and single lepton in the final state (Λ → mΙ) and conserve either the sum or the difference of baryon and lepton number (Β ± L). The tenth decay mode (Λ → p¯π+) represents a difference in baryon number of two units and no difference in lepton number. Furthermore, we observe no significant signal and set upper limits on the branching fractions of these reactions in the range (4 – 200) x 107 at the 90% confidence level.},

  doi          = {10.1103/PhysRevD.92.072002},

  journal      = {Physical Review. D, Particles, Fields, Gravitation and Cosmology},

  number       = 07,

  volume       = 92,

  place        = {United States},

  year         = {Fri Oct 09 00:00:00 EDT 2015},

  month        = {Fri Oct 09 00:00:00 EDT 2015}

}

Copy to clipboard

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Works referencing / citing this record:

Prospects for rare and forbidden hyperon decays at BESIII
journal, May 2017

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Title: Search for baryon-number and lepton-number violating decays of Λ hyperons using the CLAS detector at Jefferson Laboratory

Abstract

Citation Formats

Review of Particle Physics journal, August 2014

Search for baryon number violation in top-quark decays journal, April 2014

Partial-symmetries of weak interactions journal, February 1961

On anomalous electroweak baryon-number non-conservation in the early universe journal, May 1985

Search for baryon and lepton number violating decays of the τ lepton journal, April 1999

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Search for baryon and lepton number violating Z0 decays journal, February 1999

Violation of <i>CP</i> in variance, <i>C</i> asymmetry, and baryon asymmetry of the universe [Нарушение CP-инвариантности. C-асимметрия и барионная асимметрия Вселенной] journal, January 1991

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Search for Proton Decay via p → e + π 0 and p → μ + π 0 in a Large Water Cherenkov Detector journal, April 2009

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Operator Analysis of Nucleon Decay journal, November 1979

Unified approach to the classical statistical analysis of small signals journal, April 1998

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Baryon Number Violation Involving Higher Generations text, January 2005

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Review of Particle Physics
journal, August 2014

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journal, April 2014

Partial-symmetries of weak interactions
journal, February 1961

On anomalous electroweak baryon-number non-conservation in the early universe
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Experimental search for neutron–mirror neutron oscillations using storage of ultracold neutrons
journal, May 2008

Search for baryon and lepton number violating Z0 decays
journal, February 1999

Violation of <i>CP</i> in variance, <i>C</i> asymmetry, and baryon asymmetry of the universe [Нарушение CP-инвариантности. C-асимметрия и барионная асимметрия Вселенной]
journal, January 1991

Observational Tests of Antimatter Cosmologies
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Violation of CP in variance, C asymmetry, and baryon asymmetry of the universe
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Unity of All Elementary-Particle Forces
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Search for Proton Decay via $p \to e^{+} π^{0}$ and $p \to μ^{+} π^{0}$ in a Large Water Cherenkov Detector
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Searches for the baryon- and lepton-number violating decays $B^{0} \to Λ_{c}^{+} l^{-}$ , $B^{-} \to Λ l^{-}$ , and $B^{-} \to \bar{Λ} l^{-}$
journal, May 2011

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Unified approach to the classical statistical analysis of small signals
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The CEBAF large acceptance spectrometer (CLAS)
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journal, May 2017