Simultaneous measurement of KS and KL decays into π+π-γ

E. Ramberg; G. J. Bock; R. Coleman; J. Enagonio; Y. B. Hsiung; K. Stanfield; R. Tschirhart; T. Yamanaka; A. R. Barker; R. A. Briere; L. K. Gibbons; G. Makoff; V. Papadimitriou; J. R. Patterson; S. Somalwar; Y. W. Wah; B. Winstein; R. Winston; M. Woods; H. Yamamoto; E. C. Swallow; G. Blair; G. D. Gollin; M. Karlsson; J. K. Okamitsu; P. Debu; B. Peyaud; R. Turlay; B. Vallage

doi:10.1103/PhysRevLett.70.2525

Simultaneous measurement of KS and KL decays into π+π-γ

E. Ramberg, G. J. Bock, R. Coleman, J. Enagonio, Y. B. Hsiung, K. Stanfield, R. Tschirhart, T. Yamanaka, A. R. Barker, R. A. Briere, L. K. Gibbons, G. Makoff, V. Papadimitriou, J. R. Patterson, S. Somalwar, Y. W. Wah, B. Winstein, R. Winston, M. Woods, H. YamamotoE. C. Swallow, G. Blair, G. D. Gollin, M. Karlsson, J. K. Okamitsu, P. Debu, B. Peyaud, R. Turlay, B. Vallage

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Abstract

With the E731 apparatus at Fermilab, we have simultaneously collected 6859 KL and KS decays into π+π-γ. Using our sample of over 370 000 π+π- decays for normalization we have determined that the ratio Γ(K0→π+π-γ)/Γ(K0→π+π-) is (23.0±0.7)×10-3 for KL and (7.10±0.22)×10-3 for KS, for photon energies greater than 20 MeV in the kaon center of mass. After removing the inner-bremsstrahlung contribution, we find that the photon energy spectrum of the direct emission decay of the KL is consistent with the presence of a vector meson propagator in the form factor.

Original language	English (US)
Pages (from-to)	2525-2528
Number of pages	4
Journal	Physical review letters
Volume	70
Issue number	17
DOIs	https://doi.org/10.1103/PhysRevLett.70.2525
State	Published - 1993
Externally published	Yes

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General Physics and Astronomy

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10.1103/PhysRevLett.70.2525

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Ramberg, E., Bock, G. J., Coleman, R., Enagonio, J., Hsiung, Y. B., Stanfield, K., Tschirhart, R., Yamanaka, T., Barker, A. R., Briere, R. A., Gibbons, L. K., Makoff, G., Papadimitriou, V., Patterson, J. R., Somalwar, S., Wah, Y. W., Winstein, B., Winston, R., Woods, M., ... Vallage, B. (1993). Simultaneous measurement of KS and KL decays into π+π-γ. Physical review letters, 70(17), 2525-2528. https://doi.org/10.1103/PhysRevLett.70.2525

Ramberg, E, Bock, GJ, Coleman, R, Enagonio, J, Hsiung, YB, Stanfield, K, Tschirhart, R, Yamanaka, T, Barker, AR, Briere, RA, Gibbons, LK, Makoff, G, Papadimitriou, V, Patterson, JR, Somalwar, S, Wah, YW, Winstein, B, Winston, R, Woods, M, Yamamoto, H, Swallow, EC, Blair, G, Gollin, GD, Karlsson, M, Okamitsu, JK, Debu, P, Peyaud, B, Turlay, R & Vallage, B 1993, 'Simultaneous measurement of KS and KL decays into π+π-γ', Physical review letters, vol. 70, no. 17, pp. 2525-2528. https://doi.org/10.1103/PhysRevLett.70.2525

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title = "Simultaneous measurement of KS and KL decays into π+π-γ",

abstract = "With the E731 apparatus at Fermilab, we have simultaneously collected 6859 KL and KS decays into π+π-γ. Using our sample of over 370 000 π+π- decays for normalization we have determined that the ratio Γ(K0→π+π-γ)/Γ(K0→π+π-) is (23.0±0.7)×10-3 for KL and (7.10±0.22)×10-3 for KS, for photon energies greater than 20 MeV in the kaon center of mass. After removing the inner-bremsstrahlung contribution, we find that the photon energy spectrum of the direct emission decay of the KL is consistent with the presence of a vector meson propagator in the form factor.",

author = "E. Ramberg and Bock, \{G. J.\} and R. Coleman and J. Enagonio and Hsiung, \{Y. B.\} and K. Stanfield and R. Tschirhart and T. Yamanaka and Barker, \{A. R.\} and Briere, \{R. A.\} and Gibbons, \{L. K.\} and G. Makoff and V. Papadimitriou and Patterson, \{J. R.\} and S. Somalwar and Wah, \{Y. W.\} and B. Winstein and R. Winston and M. Woods and H. Yamamoto and Swallow, \{E. C.\} and G. Blair and Gollin, \{G. D.\} and M. Karlsson and Okamitsu, \{J. K.\} and P. Debu and B. Peyaud and R. Turlay and B. Vallage",

year = "1993",

doi = "10.1103/PhysRevLett.70.2525",

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T1 - Simultaneous measurement of KS and KL decays into π+π-γ

AU - Ramberg, E.

AU - Bock, G. J.

AU - Coleman, R.

AU - Enagonio, J.

AU - Hsiung, Y. B.

AU - Stanfield, K.

AU - Tschirhart, R.

AU - Yamanaka, T.

AU - Barker, A. R.

AU - Briere, R. A.

AU - Gibbons, L. K.

AU - Makoff, G.

AU - Papadimitriou, V.

AU - Patterson, J. R.

AU - Somalwar, S.

AU - Wah, Y. W.

AU - Winstein, B.

AU - Winston, R.

AU - Woods, M.

AU - Yamamoto, H.

AU - Swallow, E. C.

AU - Blair, G.

AU - Gollin, G. D.

AU - Karlsson, M.

AU - Okamitsu, J. K.

AU - Debu, P.

AU - Peyaud, B.

AU - Turlay, R.

AU - Vallage, B.

PY - 1993

Y1 - 1993

N2 - With the E731 apparatus at Fermilab, we have simultaneously collected 6859 KL and KS decays into π+π-γ. Using our sample of over 370 000 π+π- decays for normalization we have determined that the ratio Γ(K0→π+π-γ)/Γ(K0→π+π-) is (23.0±0.7)×10-3 for KL and (7.10±0.22)×10-3 for KS, for photon energies greater than 20 MeV in the kaon center of mass. After removing the inner-bremsstrahlung contribution, we find that the photon energy spectrum of the direct emission decay of the KL is consistent with the presence of a vector meson propagator in the form factor.

AB - With the E731 apparatus at Fermilab, we have simultaneously collected 6859 KL and KS decays into π+π-γ. Using our sample of over 370 000 π+π- decays for normalization we have determined that the ratio Γ(K0→π+π-γ)/Γ(K0→π+π-) is (23.0±0.7)×10-3 for KL and (7.10±0.22)×10-3 for KS, for photon energies greater than 20 MeV in the kaon center of mass. After removing the inner-bremsstrahlung contribution, we find that the photon energy spectrum of the direct emission decay of the KL is consistent with the presence of a vector meson propagator in the form factor.

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JO - Physical review letters

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Simultaneous measurement of KS and KL decays into π+π-γ

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