000  02155nab a2200325 c 4500  

001  vtls000645266  
003  RUToGU  
005  20210922100049.0  
007  cr   
008  1812062017 xxu s a eng d  
024  7 
_a10.1103/PhysRevD.96.012002 _2doi 

035  _ato000645266  
040 
_aRUToGU _brus _cRUToGU 

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 CabibboKobayashiMaskawa (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. 012002101200215 _x15507998 

852  4  _aRUToGU  
856  7  _uhttp://vital.lib.tsu.ru/vital/access/manager/Repository/vtls:000645266  
908  _aстатья  
999  _c444163 