Precise measurement of Γ(K→eν(γ))/Γ(K→μν(γ)) and study of K→eνγ
Precise measurement of Γ(K→eν(γ))/Γ(K→μν(γ)) and study of K→eνγ
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Г(K→eν(γ))/Г(K→μν(γ)) 的精确测量和 K→eνγ 的研究
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发表时间：
2009
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通讯作者：
T. Collaboration
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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
我们精确测量了RK=Γ（K→ν（Γ））/Γ（K→μν（Γ））的比值，并用KLOE探测器研究了K→ν Γ的辐射过程。结果是基于在Frascati e+e−对撞机DAΦNE上收集的数据，其综合光度为2.2 fb−1。我们发现RK=（2.493±0.025stat±0.019syst）×10−5，与标准模型期望一致。利用这一结果改进了具有轻子味违反的最小超对称标准模型的参数约束。我们还测量了光子能量10的微分衰减率dΓ（K→νγ）/dEγ
We present a precise measurement of the ratio RK=Γ(K→eν(γ))/Γ(K→μν(γ)) and a study of the radiative process K→eνγ, performed with the KLOE detector. The results are based on data collected at the Frascati e+e− collider DAΦNE for an integrated luminosity of 2.2 fb−1. We find RK=(2.493±0.025stat±0.019syst)×10−5, in agreement with the Standard Model expectation. This result is used to improve constraints on parameters of the Minimal Supersymmetric Standard Model with lepton flavor violation. We also measured the differential decay rate dΓ(K→eνγ)/dEγ for photon energies 10