000 02155nab a2200325 c 4500
001 vtls000645266
003 RU-ToGU
005 20210922100049.0
007 cr |
008 181206|2017 xxu s a eng d
024 7 _a10.1103/PhysRevD.96.012002
_2doi
035 _ato000645266
040 _aRU-ToGU
_brus
_cRU-ToGU
245 1 0 _aAnalysis of D+ → K0e+νe and D+ →π0e+νe semileptonic decays
_cM. Ablikim, M. N. Achasov, S. Ahmed [et al.]
504 _aБиблиогр.: 23 назв.
520 3 _aUsing 2.93  fb−1 of data taken at 3.773 GeV with the BESIII detector operated at the BEPCII collider, we study the semileptonic decays D+→K0e+νe and D+→π0e+νe. We measure the absolute decay branching fractions B(D+→K0e+νe)=(8.600.060.15)10−2 and B(D+→π0e+νe)=(3.630.080.05)10−3, where the first uncertainties are statistical and the second systematic. We also measure the differential decay rates and study the form factors of these two decays. With the values of |Vcs| and |Vcd| from Particle Data Group fits assuming Cabibbo-Kobayashi-Maskawa (CKM) unitarity, we obtain the values of the form factors at q2=0, fK+(0)=0.7250.0040.012, and fπ+(0)=0.6220.0120.003. Taking input from recent lattice QCD calculations of these form factors, we determine values of the CKM matrix elements |Vcs|=0.9440.0050.0150.024 and |Vcd|=0.2100.0040.0010.009, where the third uncertainties are theoretical.
653 _aBESIII, детектор
653 _aBEPCII, коллайдер
653 _aстолкновение частиц
655 4 _aстатьи в журналах
_9745982
700 1 _aAchasov, M. N.
_9117569
700 1 _aAhmed, S.
_9360310
700 1 _aChelkov, G. A.
_996983
700 1 _aAblikim, M.
_9117568
773 0 _tPhysical Review D
_d2017
_gVol. 96, № 1. P. 012002-1-012002-15
_x1550-7998
852 4 _aRU-ToGU
856 7 _uhttp://vital.lib.tsu.ru/vital/access/manager/Repository/vtls:000645266
908 _aстатья
999 _c444163