Measurement of the Cabibbo-Kobayashi-Maskawa Matrix Element|Vub|withB→ρeνDecays

Form factor ratios for Bs→Kℓν and BsMonahan1, Bouchard2, Lepage3 et al. 2018Phys. Rev. D251240View full textAdd to dashboardCite

“…We also tabulate our choice of priors for the chiral-continuum extrapolation for the B s → Klν decay in Tables XII and XIV, for the B s → D s lν decay in Tables XIII and XV, and for priors common to both channels in XVI, and XVII. (14) 0.31197(14) 0.32870 (17) 0.32865(17) 0.35744 (21) 0.35747(21) 0.22861 (12) 0.22862(12) 0.24566 (13) 0.24565(13) aE K ð1; 0; 0Þ 0.40661 (49) 0.40662(48) 0.45434 (73) 0.45432(70) 0.47507 (71) 0.47566(69) 0.32020 (61) 0.31986 58 (20) 0.21110(20) 0.29310 (20) 0.29310(20) 0.13460 (10) 0.13460(10) 0.18730 (10) 0.18730(10) aM η s 0.41113 (18) 0.41113(18) 0.41435 (22) 0.41433(22) 0.41185 (22) 0.41186(22) 0.29416 (12) 0.29416(12) 0.29311 (18) 0.29311(18) aM MILC π 0.15971 (20) 0.15971(20) 0.22447 (17) 0.22448(17) 0.31125 (16) 0.31124(16) 0.14789 (18) 0.14789(18) 0.20635 (18) 0.20636(18) aM MILC K 0.36530 (29) 0.36526(29) 0.38331 (24) 0.38337(24) 0.40984 (21) 0.40981(21) 0.25318 (19) 0.25317(19) 0.27217 (21) 0.27219(21) 1 þ m k 1.000(40) 1.001(40) 1 þ m ⊥ 1.000(40) 1.000 (40) (46) 1.31737(39) 1.30768 (48) 1.30727(41) 0.93126 (24) 0.93123(24) 0.92873 (20) 0.92880(20) M þ 6.3300(90) 6.3300(90) M 0 6.41 (10) 6.41 (10)…”

“…The ratio jV ub =V cb j, which enters into the length of the side of the CKM unitarity triangle opposite the preciselydetermined angle β, is a central input into tests of CKM unitarity. Both jV ub j and jV cb j have been determined through measurements of multiple exclusive mesonic decay channels [1,2], primarily B → πlν l [3][4][5][6][7][8][9][10][11] and B → D ðÃÞ lν l respectively [12][13][14][15][16][17][18][19][20], although other channels are also used [21][22][23][24][25]. The B s → K decay has generally received less theoretical attention than the corresponding B decay, largely due to the absence of experimental data, although this channel has been studied on the lattice in [26,27], and using other theoretical approaches [28], including light cone sum rules [29,30], perturbative QCD [31,32] and QCD-inspired models [33][34][35][36][37].…”

B→ρtransition form factors and theρ-meson transverse leading-twist distribution amplitude

“…The TFFs become smaller with the increment of ρ ⊥ B 2; and a larger ρ ⊥ B 2; (corresponding to a larger ⊥ a 2 ) is not allowed by the lattice QCD predictions. For example, the AdS/QCD model, equation (28), with a much larger…”

“…V ub has been studied by various experimental groups by measuring ρ → B semi-leptonic decays [26][27][28][29]. It is also helpful to compare the LCSR predictions on the CKM matrix element | |…”