Search for long-lived particles in e+e- collisions

Lees, J. P.

doi:10.1103/PhysRevLett.114.171801

Title: Search for long-lived particles in e⁺e^- collisions

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Abstract

In this study, we present a search for a neutral, long-lived particle L that is produced in e⁺e^– collisions and decays at a significant distance from the e⁺e^– interaction point into various flavor combinations of two oppositely charged tracks. The analysis uses an e⁺e^– data sample with a luminosity of 489.1 fb^–1 collected by the BABAR detector at the Υ(4S), Υ(3S), and Υ(2S) resonances and just below the Υ(4S). Fitting the two-track mass distribution in search of a signal peak, we do not observe a significant signal, and set 90% confidence level upper limits on the product of the L production cross section, branching fraction, and reconstruction efficiency for six possible two-body L decay modes as a function of the L mass. The efficiency is given for each final state as a function of the mass, lifetime, and transverse momentum of the candidate, allowing application of the upper limits to any production model. In addition, upper limits are provided on the branching fraction B(B → X_sL), where X_s is a strange hadronic system.

Authors:

Lees, J. P. ^[1]

Univ. de Savoie, Annecy-Le-Vieux (France). et al.

Publication Date:: Wed Apr 29 00:00:00 EDT 2015

Research Org.:: SLAC National Accelerator Lab., Menlo Park, CA (United States)

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

OSTI Identifier:: 1171475

Report Number(s):: SLA-PUB-16226
Journal ID: ISSN 0031-9007; PRLTAO; arXiv:1502.02580

DOE Contract Number:: AC02-76SF00515

Resource Type:: Journal Article

Journal Name:: Physical Review Letters

Additional Journal Information:: Journal Volume: 114; Journal Issue: 17; Journal ID: ISSN 0031-9007

Publisher:: American Physical Society (APS)

Country of Publication:: United States

Language:: English

Subject:: experiment-HEP; HEPEX

Citation Formats


                    Lees, J. P. Search for long-lived particles in e+e- collisions.  United States: N. p., 2015. 
        Web.  doi:10.1103/PhysRevLett.114.171801.

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                    Lees, J. P. Search for long-lived particles in e+e- collisions.  United States.  https://doi.org/10.1103/PhysRevLett.114.171801

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                    Lees, J. P. 2015.  
        "Search for long-lived particles in e+e- collisions".  United States.  https://doi.org/10.1103/PhysRevLett.114.171801.  https://www.osti.gov/servlets/purl/1171475.

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@article{osti_1171475,

  title        = {Search for long-lived particles in e+e- collisions},

  author       = {Lees, J. P.},

  abstractNote = {In this study, we present a search for a neutral, long-lived particle L that is produced in e+e– collisions and decays at a significant distance from the e+e– interaction point into various flavor combinations of two oppositely charged tracks. The analysis uses an e+e– data sample with a luminosity of 489.1 fb–1 collected by the BABAR detector at the Υ(4S), Υ(3S), and Υ(2S) resonances and just below the Υ(4S). Fitting the two-track mass distribution in search of a signal peak, we do not observe a significant signal, and set 90% confidence level upper limits on the product of the L production cross section, branching fraction, and reconstruction efficiency for six possible two-body L decay modes as a function of the L mass. The efficiency is given for each final state as a function of the mass, lifetime, and transverse momentum of the candidate, allowing application of the upper limits to any production model. In addition, upper limits are provided on the branching fraction B(B → XsL), where Xs is a strange hadronic system.},

  doi          = {10.1103/PhysRevLett.114.171801},

  url          = {https://www.osti.gov/biblio/1171475},
  journal      = {Physical Review Letters},

  issn         = {0031-9007},

  number       = 17,

  volume       = 114,

  place        = {United States},

  year         = {Wed Apr 29 00:00:00 EDT 2015},

  month        = {Wed Apr 29 00:00:00 EDT 2015}

}

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Title: Search for long-lived particles in e+e- collisions

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Title: Search for long-lived particles in e⁺e^- collisions