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First Observation o...
First Observation of D+ -> eta mu(+)nu(mu) and Measurement of Its Decay Dynamics
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- Ablikim, M. (author)
- Inst High Energy Phys, Beijing 100049, Peoples R China
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- Adlarson, Patrik (author)
- Uppsala universitet,Kärnfysik
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- Biernat, Jacek (author)
- Uppsala universitet,Kärnfysik
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- Ikegami Andersson, Walter (author)
- Uppsala universitet,Kärnfysik
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- Johansson, Tord (author)
- Uppsala universitet,Kärnfysik
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- Kupsc, Andrzej (author)
- Uppsala universitet,Kärnfysik
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- Pettersson, Joachim (author)
- Uppsala universitet,Kärnfysik
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- Schönning, Karin, 1978- (author)
- Uppsala universitet,Kärnfysik
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- Thorén, Viktor (author)
- Uppsala universitet,Kärnfysik
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- Wolke, Magnus (author)
- Uppsala universitet,Kärnfysik
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- Zou, J. H. (author)
- Inst High Energy Phys, Beijing 100049, Peoples R China
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(creator_code:org_t)
- AMER PHYSICAL SOC, 2020
- 2020
- English.
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In: Physical Review Letters. - : AMER PHYSICAL SOC. - 0031-9007 .- 1079-7114. ; 124:23
- Related links:
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https://doi.org/10.1...
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https://uu.diva-port... (primary) (Raw object)
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
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- By analyzing a data sample corresponding to an integrated luminosity of 2.93 fb(-1) collected at a center-of-mass energy of 3.773 GeV with the BESIII detector, we measure for the first time the absolute branching fraction of the D+ -> eta mu(+) nu(mu) decay to be BD+ ->eta mu+nu mu = (10.4 +/- 1.0(stat) +/- 0.5(syst)) x 10(-4). Using the world averaged value of BD+ ->eta e+nu e, the ratio of the two branching fractions is determined to be = BD+ ->eta mu+nu mu/BD+ ->eta e+nu e =0.91 +/- 0.13((stat+syst)), which agrees with the theoretical expectation of lepton flavor universality within uncertainty. By studying the differential decay rates in five four-momentum transfer intervals, we obtain the product of the hadronic form factor f(+)(eta)(0) and the c -> d Cabibbo-Kobayashi-Maskawa matrix element vertical bar V-cd vertical bar to be f(+)(eta)(0)vertical bar V-cd vertical bar = 0.087 +/- 0.008(stat) +/- 0.002(syst). Taking the input of vertical bar V-cd vertical bar from the global fit in the standard model, we determine f(+)(eta)(0) = 0.39 +/- 0.04(stat) +/- 0.01(syst). On the other hand, using the value of f(+)(eta)(0) calculated in theory, we find vertical bar V-cd vertical bar= 0.242 +/- 0.022(stat )+/- 0.006(syst) +/- 0.033(theory).
Subject headings
- NATURVETENSKAP -- Fysik -- Subatomär fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Subatomic Physics (hsv//eng)
Publication and Content Type
- ref (subject category)
- art (subject category)
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- By the author/editor
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Ablikim, M.
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Adlarson, Patrik
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Biernat, Jacek
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Ikegami Andersso ...
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Johansson, Tord
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Kupsc, Andrzej
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show more...
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Pettersson, Joac ...
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Schönning, Karin ...
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Thorén, Viktor
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Wolke, Magnus
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Zou, J. H.
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- About the subject
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Physical Science ...
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and Subatomic Physic ...
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Physical Review ...
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Uppsala University