The Physics Society of Iran Iranian Journal of Physics Research 1682-6957 13 2 2019 11 26 Semileptonic transition of B in noncommutative space- time Semileptonic transition of B in noncommutative space- time 149 161 1025 FA M Gholami M Haghighat GH Khosravi Journal Article 2019 11 26  In this paper, we study the noncommutative effect on the semileptonic transition of B Ò Dlv . We replace the weak interaction vertex in the ordinary space with its counterpart in the noncommutative space. It is shown that, more new form factors are needded to describe the hadronic part of the transition amplitude. All the form factors are obtained at the lowest order of three point QCD sum rule. Consequently, the decay rate of B Ò Dlv is calculated and a bound of the order of 4 GeV on is given for B Ò Dlv=(5.5 ± 0.5) × 10-2.  In this paper, we study the noncommutative effect on the semileptonic transition of B Ò Dlv . We replace the weak interaction vertex in the ordinary space with its counterpart in the noncommutative space. It is shown that, more new form factors are needded to describe the hadronic part of the transition amplitude. All the form factors are obtained at the lowest order of three point QCD sum rule. Consequently, the decay rate of B Ò Dlv is calculated and a bound of the order of 4 GeV on is given for B Ò Dlv=(5.5 ± 0.5) × 10-2. https://ijpr.iut.ac.ir/article_1025_82b8a3434904411a9fdc43ca87cee70c.pdf