Search Results - "Bryman, D. A"
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Improved Measurement of the π→eν Branching Ratio
Published in Physical review letters (14-08-2015)“…A new measurement of the branching ratio R_{e/μ}=Γ(π^{+}→e^{+}ν+π^{+}→e^{+}νγ)/Γ(π^{+}→μ^{+}ν+π^{+}→μ^{+}νγ) resulted in…”
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Search for massive neutrinos in π+→e+νe decay
Published in Hyperfine interactions (2017)“…The PIENU experiment aims to measure the branching ratio of the charged pion decay with precision of < 0.1 %. This measurement is much sensitive to search for…”
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Initial results from the PIENU experiment
Published in Hyperfine interactions (2017)“…The pion branching ratio, R π = Γ ( π + → e + ν e + π + → e + ν e γ ) Γ ( π + → μ + ν μ + π + → μ + ν μ γ ) , provides a sensitive test of lepton universality…”
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Search for heavy neutrinos in K + → μ + ν H decays
Published in Physical review. D, Particles, fields, gravitation, and cosmology (02-03-2015)“…Here, evidence of a heavy neutrino, νH, in the K+→μ+νH decays was sought using the E949 experimental data with an exposure of 1.70 × 1012 stopped kaons. With…”
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Study of a large NaI(Tl) crystal
Published in Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment (01-09-2010)“…Using a narrow band positron beam, the response of a large high-resolution NaI(Tl) crystal to an incident positron beam was measured. It was found that nuclear…”
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Constraints on Sterile Neutrinos in the MeV to GeV Mass Range
Published 24-09-2019“…Phys. Rev. D 100, 073011 (2019) A detailed discussion is given of the analysis of recent data to obtain improved upper bounds on the couplings $|U_{e4}|^2$ and…”
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Improved Constraints on Sterile Neutrinos in the MeV to GeV Mass Range
Published 15-04-2019“…Phys. Rev. D 100, 053006 (2019) Improved upper bounds are presented on the coupling $|U_{e4}|^2$ of an electron to a sterile neutrino $\nu_4$ from analyses of…”
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Search for heavy neutrinos in π → μν decay
Published in Physics letters. B (10-11-2019)“…In the present work of the PIENU experiment, heavy neutrinos were sought in pion decays π+→μ+ν at rest by examining the observed muon energy spectrum for extra…”
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Measurement of the pi +-->e+ nu branching ratio
Published in Physical review letters (18-05-1992)Get full text
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New Measurement of the K + → π + ν ν ¯ Branching Ratio
Published in Physical review letters (07-11-2008)Get full text
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Observation of the Decay K + → π + γ γ
Published in Physical review letters (24-11-1997)Get full text
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Observation of the Decay K + → π + μ + μ
Published in Physical review letters (15-12-1997)Get full text
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500 MHz transient digitizers based on GaAs CCDs
Published in Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment (11-09-1997)“…A system of 500 MHz transient digitizers based on gallium arsenide resistive gate charged coupled devices has been developed for an experiment to study rare K…”
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Central tracking chamber with inflated cathode-strip foils
Published in Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment (1998)“…A new cylindrical low-mass central drift chamber has been constructed for the K + → π +ν ν experiment at BNL (E787). The chamber consists of twelve layers of…”
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Improved search for massive neutrinos in π+→e+ν decay
Published in Physical review. D, Particles and fields (01-08-1992)Get full text
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High purity pion beam at TRIUMF
Published in Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment (11-10-2009)“…An extension of the TRIUMF M13 low-energy pion channel designed to suppress positrons based on an energy-loss technique is described. A source of beam channel…”
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Light absorption in a resistive-gate GaAs charge-coupled device
Published in Journal of Vacuum Science & Technology A: Vacuum, Surfaces, and Films (01-03-2000)“…A 128 pixel uniphase resistive-gate GaAs charge-coupled device was fabricated at the TRI University Meson Facility to study its optical absorption properties…”
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Conference Proceeding Journal Article -
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Search for massive neutrinos in π + → e + ν e ${\pi }^{+}{\rightarrow }e^{+}{\nu }_{e}$ decay
Published in Hyperfine interactions (01-11-2017)Get full text
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Liquid Xenon Detectors for Positron Emission Tomography
Published 07-04-2011“…J.Phys.Conf.Ser.312:062006,2011 PET is a functional imaging technique based on detection of annihilation photons following beta decay producing positrons. In…”
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Search for Massive Neutrinos in the Decay pi --> e nu
Published 20-06-2011“…Evidence of massive neutrinos in the pi --> e nu decay spectrum was sought with the background pi --> mu --> e decay chain highly suppressed. Upper limits (90%…”
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