Measurements of the branching fractions and decay distributions for K(L) ---&gt; pi+- mu-+ nu gamma and K(L) ---&gt; pi+- e-+ nu gamma

Alexopoulos, T.

doi:10.1103/PhysRevD.71.012001

Measurements of the branching fractions and decay distributions for K(L) ---> pi+- mu-+ nu gamma and K(L) ---> pi+- e-+ nu gamma

Journal Article · Fri Oct 01 04:00:00 EDT 2004 · Phys.Rev.D

DOI:https://doi.org/10.1103/PhysRevD.71.012001· OSTI ID:1863009

Alexopoulos, T.

We present measurements of R_Kl3rad = Gamma(KL->\pi\ell\nu\gamma; Egcm > 10 MeV)/Gamma(KL->\pi\ell\nu), where ell = mu or e, and Egcm is the photon energy in the kaon rest frame. These measurements are based on KL decays collected in 1997 by the KTeV (E832) experiment at Fermilab. With samples of 1385 KL->\pi\mu\nu\gamma and 14221 KL->\pi\e\nu\gamma candidates, we find R_Km3rad = (0.530 +- 0.019)% and R_Ke3rad = (4.942 +- 0.062)%. We also examine distributions of photon energy and lepton-photon angle.

Research Organization:: Fermi National Accelerator Laboratory (FNAL), Batavia, IL (United States)

Sponsoring Organization:: USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)

Contributing Organization:: KTeV

DOE Contract Number:: AC02-07CH11359

OSTI ID:: 1863009

Report Number(s):: FERMILAB-PUB-04-406-E; arXiv:hep-ex/0410070; oai:inspirehep.net:662723

Journal Information:: Phys.Rev.D, Journal Name: Phys.Rev.D Vol. 71

Country of Publication:: United States

Language:: English

References (13)

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Measurements of K L branching fractions and the C P violation parameter \| η + − \| Alexopoulos, T.; Arenton, M.; Barbosa, R. F. Physical Review D, Vol. 70, Issue 9 https://doi.org/10.1103/PhysRevD.70.092006	journal	November 2004
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Measurements of semileptonic K L decay form factors Alexopoulos, T.; Arenton, M.; Barbosa, R. F. Physical Review D, Vol. 70, Issue 9 https://doi.org/10.1103/PhysRevD.70.092007	journal	November 2004
New measurement of the radiative K e 3 branching ratio and photon spectrum Alavi-Harati, A.; Alexopoulos, T.; Arenton, M. Physical Review D, Vol. 64, Issue 11 https://doi.org/10.1103/PhysRevD.64.112004	journal	November 2001
A Determination of the Cabibbo-Kobayashi-Maskawa Parameter \| V u s \| _ Using K L Decays Alexopoulos, T.; Arenton, M.; Barbosa, R. F. Physical Review Letters, Vol. 93, Issue 18 https://doi.org/10.1103/PhysRevLett.93.181802	journal	October 2004
Measurements of direct CP violation, CPT symmetry, and other parameters in the neutral kaon system Alavi-Harati, A.; Alexopoulos, T.; Arenton, M. Physical Review D, Vol. 67, Issue 1 https://doi.org/10.1103/PhysRevD.67.012005	journal	January 2003

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