LSND, SN1987A, and CPT violation

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We point out that neutrino events observed at Kamiokande andIMB from SN1987A disfavor the neutrino oscillation parameters preferredby the LSND experiment. For Delta m2>0 (the light side), theelectron neutrinos from the neutronization burst would be lost, while thefirst event at Kamiokande is quite likely to be due to an electronneutrino. For Delta m2<0 (the dark side), the average energy of thedominantly bar nu e events is already lower than the theoreticalexpectations, which would get aggravated by a complete conversion frombar nu mu to bar nu e. If taken seriously, the LSND data are disfavoredindependent of the existence of a sterile ... continued below

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Murayama, Hitoshi & Yanagida, T. October 17, 2000.

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We point out that neutrino events observed at Kamiokande andIMB from SN1987A disfavor the neutrino oscillation parameters preferredby the LSND experiment. For Delta m2>0 (the light side), theelectron neutrinos from the neutronization burst would be lost, while thefirst event at Kamiokande is quite likely to be due to an electronneutrino. For Delta m2<0 (the dark side), the average energy of thedominantly bar nu e events is already lower than the theoreticalexpectations, which would get aggravated by a complete conversion frombar nu mu to bar nu e. If taken seriously, the LSND data are disfavoredindependent of the existence of a sterile neutrino. A possible remedy isCPT violation, which allows different mass spectra for neutrinos andanti-neutrinos and hence can accommodate atmospheric, solar and LSND datawithout a sterile neutrino. If this is the case, Mini-BooNE must run inbar nu rather than the planned nu mode to test the LSND signal. Wespeculate on a possible origin of CPT violation.

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  • Journal Name: Physics Letters; Journal Volume: B520; Journal Issue: 3-4; Related Information: Journal Publication Date: 15 November2001

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  • Report No.: LBNL--46955
  • Report No.: UCB-PTH-00-36
  • Grant Number: DE-AC02-05CH11231
  • Grant Number: NSF:PHY-0098840
  • Office of Scientific & Technical Information Report Number: 917322
  • Archival Resource Key: ark:/67531/metadc887467

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

Office of Scientific and Technical Information (OSTI) is the Department of Energy (DOE) office that collects, preserves, and disseminates DOE-sponsored research and development (R&D) results that are the outcomes of R&D projects or other funded activities at DOE labs and facilities nationwide and grantees at universities and other institutions.

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  • October 17, 2000

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  • Sept. 22, 2016, 2:13 a.m.

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  • Dec. 15, 2016, 1:26 p.m.

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Murayama, Hitoshi & Yanagida, T. LSND, SN1987A, and CPT violation, article, October 17, 2000; Berkeley, California. (digital.library.unt.edu/ark:/67531/metadc887467/: accessed December 16, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.