JOPSS:検索結果一覧

検索結果：　2 件中 1件目～2件目を表示

発表形式

Initialising ...

選択項目を絞り込む

掲載資料名

Initialising ...

発表会議名

Initialising ...

筆頭著者名

Initialising ...

キーワード

Initialising ...

発表言語

Initialising ...

発行年

Initialising ...

開催年

Initialising ...

論文

Study of $overline{B}{}^0rightarrow D^{+}h^{-} (h=K/pi)$ decays at Belle

Waheed, E.*; 谷田聖; Belle Collaboration*; 他205名*

Physical Review D, 105(1), p.012003_1 - 012003_9, 2022/01

https://doi.org/10.1103/PhysRevD.105.012003

被引用回数：4 パーセンタイル：32.43(Astronomy & Astrophysics)

We present a measurement of the branching fractions of the Cabibbo favored $overline{B}{}^0rightarrow D^{+}pi^{-}$ and the Cabibbo suppressed $overline{B}{}^0rightarrow D^{+}K^{-}$ decays. We find $mathcal{B}(overline{B}{}^0rightarrow D^{+}pi^{-}) = (2.48 pm 0.01 pm 0.09 pm 0.04) times 10^{-3}$ and $mathcal{B}(overline{B}{}^0rightarrow D^{+}K^{-})= (2.03 pm 0.05 pm 0.07 pm 0.03) times 10^{-4}$ decays, where the first uncertainty is statistical, the second is systematic, and the third uncertainty is due to the $D^{+} rightarrow K^{-}pi^{+}pi^{+}$ branching fraction. The ratio of branching fractions of $overline{B}{}^0rightarrow D^{+}K^{-}$ and $overline{B}{}^0rightarrow D^{+}pi^{-}$ is measured to be $R^{D} = [8.19 pm 0.20(rm stat) pm 0.23(rm syst)] times 10^{-2}$ . These measurements are performed using the full Belle data set, which corresponds to $772 times 10^{6} Boverline{B}$ pairs.

論文

Measurement of the CKM matrix element $|V_{cb}|$ from $B^0to D^{*-}ell^ {+} nu_ell$ at Belle

Waheed, E.*; 谷田聖; Belle Collaboration*; 他187名*

Physical Review D, 100(5), p.052007_1 - 052007_32, 2019/09

https://doi.org/10.1103/PhysRevD.100.052007

被引用回数：54 パーセンタイル：90.59(Astronomy & Astrophysics)

We present a new measurement of the CKM matrix element $|V_{cb}|$ from $B^{0} rightarrow D^{*}ell nu$ decays, reconstructed with full Belle data set ( $711 , rm fb^{-1}$ ). Two form factor parameterisations, based on work by the CLN and BGL groups, are used to extract the product $mathcal{F}(1)eta_{rm EW}|V_{cb}|$ and the decay form factors, where is the factor normalisation and $eta_{rm EW}$ is a small electroweak correction. In the CLN parameterisation we find $mathcal{F}(1)eta_{rm EW}|V_{cb}| = (35.06 pm 0.15 pm 0.54) times 10^{-3}$ , $rho^{2}=1.106 pm 0.031 pm 0.007$ , $R_{1}(1)=1.229 pm 0.028 pm 0.009$ , $R_{2}(1)=0.852 pm 0.021 pm 0.006$ . In the BGL parameterisation we find $mathcal{F}(1)eta_{rm EW}|V_{cb}|= 38.73 pm 0.25 pm 0.60$ , which is higher but consistent with the determination from inclusive semileptonic decays when correcting for $mathcal{F}(1)eta_{rm EW}$ . This is the most precise measurement of $mathcal{F}(1)eta_{rm EW}|V_{cb}|$ and form factors that has ever been carried out, and the first direct study of the BGL form factor parameterisation in an experimental measurement.