New determination of the branching ratio of the structure dependent radiative K+ → e+νγ
New determination of the branching ratio of the structure dependent radiative K+ → e+νγ
复制标题
结构相关辐射 K 的支化比的新测定
DOI:
10.1016/j.physletb.2023.138020
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发表时间:
2023
影响因子:
4.4
通讯作者:
Horie, K.
中科院分区:
文献类型:
--
作者:
Kobayashi, A.;Ito, H.;Bianchin, S.;Cao, T.;Djalali, C.;Dongwi, D.H.;Gautam, T.;Gill, D.;Hasinoff, M.D.;Horie, K.
The branching ratio of the structure dependent (SD) radiative K+→ e+ ν e γ decay relative to that of the K+→ e+ ν e (γ) decay including the internal bremsstrahlung (IB) process (K e 2 (γ)) has been measured in the J-PARC E36 experiment using plastic scintillator/lead sandwich detectors, in contrast to the previous E36 measurement, which used a CsI (Tl) calorimeter. In the analysis, the effect of IB was also taken into account in the SD radiative decay as K e 2 γ (γ) SD. By combining the new data with the previous E36 result after revision for the IB correction for K e 2 γ (γ) SD, a new value B r (K e 2 γ (γ) SD)/B r (K e 2 (γ))= 1.20±0.07 has been determined. This is consistent with a recent lattice QCD calculation, but larger than the expectation of Chiral Perturbation Theory (ChPT) at order O (p 4) and the previous KLOE value. Using the method to relate form factor and branching ratio described in the KLOE paper, the present result is also consistent with the form factor prediction based on a gauged nonlocal chiral quark model, but larger than that from ChPT at order O (p 6).
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DOI:
--
发表时间:
2005
期刊:
影响因子:
--
作者:
C. Gatti
通讯作者:
C. Gatti
DOI:
--
发表时间:
1995
期刊:
影响因子:
--
作者:
M. Finkemeier
通讯作者:
M. Finkemeier
影响因子:
4.4
作者:
Ito, H.;Kobayashi, A.;Bianchin, S.;Cao, T.;Djalali, C.;Dongwi, D.H.;Gautam, T.;Gill, D.;Hasinoff, M.D.;Horie, K.
通讯作者:
Horie, K.
DOI:
10.1016/j.nima.2018.05.065
发表时间:
2018
期刊:
Detectors and Associated Equipment
影响因子:
--
作者:
Ito, H.;Horie, K.;Shimizu, S.;Bianchin, S.;Djalali, C.;Dongwi, B.;Gill, D.;Hasinoff, M.D.;Igarashi, Y.;Imazato, J.
通讯作者:
Imazato, J.
DOI:
--
发表时间:
2009
期刊:
影响因子:
--
作者:
F. Ambrosino;A. Antonelli;M. Antonelli;F. Archilli;P. Beltrame;G. Bencivenni;C. Bini;C. Bloise;S. Bocchetta;F. Bossi;P. Branchini;G. Capon;D. Capriotti;T. Capussela;F. Ceradini;P. Ciambrone;E. Lucia;A. Santis;P. Simone;G. Zorzi;A. Denig;A. Domenico;C. Donato;B. Micco;M. Dreucci;G. Felici;S. Fiore;P. Franzini;C. Gatti;P. Gauzzi;S. Giovannella;E. Graziani;M. Jacewicz;V. Kulikov;G. Lanfranchi;J. Lee‐Franzini;M. Martini;P. Massarotti;S. Meola;S. Miscetti;M. Moulson;S. Müller;F. Murtas;M. Napolitano;F. Nguyen;M. Palutan;A. Passeri;V. Patera;P. Santangelo;B. Sciascia;A. Sibidanov;T. Spadaro;L. Tortora;P. Valente;G. Venanzoni;R. Versaci;T. Collaboration
通讯作者:
T. Collaboration