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Experimental study of direct photon emission in K- --> pi- pi0 gamma decay using ISTRA+ detector | V.A. Uvarov
; S.A. Akimenko
; G.I. Britvich
; K.V. Datsko
; A.P. Filin
; A.V. Inyakin
; V.A. Khmelnikov
; A.S. Konstantinov
; V.F. Konstantinov
; I.Y. Korolkov
; V.M. Leontiev
; V.P. Novikov
; V.F. Obraztsov
; V.A. Polyakov
; V.I. Romanovsky
; V.M. Ronjin
; V.I. Shelikhov
; N.E. Smirnov
; O.G. Tchikilev
; O.P. Yushchenko
; V.N. Bolotov
; V.A. Duk
; S.V. Laptev
; A.Yu. Polyarush
; | Date: |
19 Oct 2004 | Subject: | hep-ex | Affiliation: | Institute for High Energy Physics, Protvino, Russia), V.N. Bolotov, V.A. Duk, S.V. Laptev, A.Yu. Polyarush (Institute for Nuclear Research, Moscow, Russia | Abstract: | The branching ratio in the charged-pion kinetic energy region of 55 to 90 MeV for the direct photon emission in the K- --> pi- pi0 gamma decay has been measured using in-flight decays detected with the ISTRA+ setup operating in the 25 GeV/c negative secondary beam of the U-70 PS. The value Br(DE)=[0.37+-0.39(stat)+-0.10(syst)]*10^(-5) obtained from the analysis of 930 completely reconstructed events is consistent with the average value of two stopped-kaon experiments, but it differs by 2.5 standard deviations from the average value of three in-flight-kaon experiments. The result is also compared with recent theoretical predictions. | Source: | arXiv, hep-ex/0410049 | Services: | Forum | Review | PDF | Favorites |
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