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SUMMARY:Semileptonic $B\\to D$ and $B_s\\to D_S$ decays in the AdS/QCD Sof
 twall model
DTSTART;VALUE=DATE-TIME:20261108T073000Z
DTEND;VALUE=DATE-TIME:20261108T080000Z
DTSTAMP;VALUE=DATE-TIME:20261023T141920Z
UID:indico-contribution-2982@indico.itp.ac.cn
DESCRIPTION:Speakers: Miguel Angel Martin Contreras (University of South C
 hina)\nWe present a holographic calculation of the semileptonic decays $B\
 \to D$ and $B_s\\to D_s$ within the AdS/QCD Softwall Model. Heavy-light me
 sons are described by normalizable bulk modes\, while the flavor-changing 
 current $J_\\text{EW}^\\mu=\\bar{c}\\\,\\gamma^\\mu\\\,b$ is associated wi
 th a *massless* bulk vector field\, motivated by the UV scaling dimension 
 $\\Delta=3$ of the QCD current. An effective bulk interaction yields the *
 overlap integral* from which we extract the holographic Isgur-Wise functio
 n $\\xi(\\omega)$\, and the vector $f_+(q^2)$  and scalar $f_0(q^2)$  form
  factors. We also evaluate the Lepton Flavor Universality Ratios $R(D)$ an
 d $R(D_s)$\, comparing our predictions with lattice QCD and available expe
 rimental data. Finally\, we discuss the limitations of the leading-order h
 olographic description.\n\nhttps://indico.itp.ac.cn/event/417/contribution
 s/2982/
LOCATION:
URL:https://indico.itp.ac.cn/event/417/contributions/2982/
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