pdgLive

B

\to

\overset{―}{b}

\to

\overset{―}{s} γ

Decay Mode Summary INSPIRE PDGID:

	Mode ^()*		Fraction ( $Γ_{i}$ / $Γ$ )	Scale Factor/ Conf. Level	P(MeV/c)


$Γ_{81}$	$B$ $\to$ $\overset{―}{b}$ $\to$ $\overset{―}{s} γ$		( $3.49$ $\pm 0.19$ ) $\times 10^{- 4}$

Category:

K

or

K^{*}

modes

The following data is related to the above value:

▸ expand all datablocks

Γ (

B

\to

\overset{―}{b}

\to

\overset{―}{d} γ) / Γ (

B

\to

\overset{―}{b}

\to

\overset{―}{s} γ)

Γ_{82} / Γ_{81}

Γ (

B

\to

\overset{―}{b}

\to

\overset{―}{s} γ) / Γ_{total}

Γ_{81} / Γ

VALUE (

10^{- 4}

)

DOCUMENT ID

TECN

COMMENT

3.49 \pm 0.19

OUR AVERAGE

3.75

\pm 0.18

\pm 0.35

BELL

e^{+}

e^{-}

\to

Υ (4 S)

3.52

\pm 0.20

\pm 0.51

BABR

e^{+}

e^{-}

\to

Υ (4 S)

3.32

\pm 0.16

\pm 0.31

BABR

e^{+}

e^{-}

\to

Υ (4 S)

3.47

\pm 0.15

\pm 0.40

BELL

e^{+}

e^{-}

\to

Υ (4 S)

3.90

\pm 0.91

\pm 0.64

BABR

e^{+}

e^{-}

\to

Υ (4 S)

3.29

\pm 0.44

\pm 0.29

CLE2

e^{+}

e^{-}

\to

Υ (4 S)

• • We do not use the following data for averages, fits, limits, etc. • •

2.30

\pm 0.08

\pm 0.30

DEL-AMO-SANCH..

BABR

e^{+}

e^{-}

\to

Υ (4 S)

4.3

\pm 0.3

\pm 0.7

BABR

Repl. by

3.92

\pm 0.31

\pm 0.47

BABR

Repl. by LEES 2012V

3.49

\pm 0.20

_{- 0.46}^{+ 0.59}

BABR

Repl. by LEES 2012U

3.50

\pm 0.32

\pm 0.31

BELL

Repl. by LIMOSANI 2009

3.36

\pm 0.53

_{- 0.68}^{+ 0.65}

BELL

Repl. by SAITO 2015

2.32

\pm 0.57

\pm 0.35

CLE2

Repl. by CHEN 2001C

¹	We extrapolate the measured value to $E_{γ} >$ 1.6 GeV using the method of BUCHMUELLER 2006 (average of three theoretical models).

²	SAITO 2015 measured ( $3.51$ $\pm 0.17$ $\pm 0.33$ ) $\times 10^{- 4}$ using a sum-of-exclusive approach in which 38 of the hadronic final states with $m_{X_{s}}$ $<$ 2.8 GeV/c $^{2}$ are reconstructed. The cut of minimum photon energy is $E_{γ}$ $>$ 1.9 GeV.

³	Reports ( $3.29$ $\pm 0.19$ $\pm 0.48$ ) $\times 10^{- 4}$ for $E_{γ}$ $>$ 1.9 GeV.

⁴	Reports ( $3.21$ $\pm 0.15$ $\pm 0.29$ $\pm 0.08$ ) $\times 10^{- 4}$ for 1.8 $<$ $E_{γ}$ $<$ 2.8 GeV, where the last systematic uncertainty is for model dependency. Results with other cutoffs are also reported.

⁵	The measurement reported is ( $3.45$ $\pm 0.15$ $\pm 0.40$ ) $\times 10^{- 4}$ for $E_{γ} >$ 1.7 GeV.

⁶	Uses a fully reconstructed $B$ meson as a tag on the recoil side. The measurement reported is ( $3.66$ $\pm 0.85$ $\pm 0.60$ ) $\times 10^{- 4}$ for $E_{γ} >$ 1.9 GeV.

⁷	The measurement reported is ( $3.21$ $\pm 0.43$ $_{- 0.29}^{+ 0.32}$ ) $\times 10^{- 4}$ for $E_{γ} >$ 2.0 GeV.

⁸	Measured using sums of seven exclusive final states $B$ $\to$ ${{\mathit X}_{{{d}(s)}}}} {{\mathit \gamma}} where {{\mathit X}_{{{d}(s)}}}} is a nonstrange (strange) charmless hadronic system in mass range 0.5 - 2.0 GeV/c{}^{2}.

⁹	Measured using sums of seven exclusive final states $B$ $\to$ ${{\mathit X}_{{{d}(s)}}}} {{\mathit \gamma}} where {{\mathit X}_{{{d}(s)}}}} is a nonstrange (strange) charmless hadronic system in mass range 0.6 - 1.8 GeV/c{}^{2}.

¹⁰	The measurement reported is ( $3.67$ $\pm 0.29$ $\pm 0.45$ ) $\times 10^{- 4}$ for $E_{γ} >$ 1.9 GeV.

¹¹	The measurement reported is ( $3.27$ $\pm 0.18$ $_{- 0.42}^{+ 0.55}$ ) $\times 10^{- 4}$ for $E_{γ} >$ 1.9 GeV.

¹²	The measurement reported is ( $3.55$ $\pm 0.32$ $\pm 0.32$ ) $\times 10^{- 4}$ for $E_{γ} >$ 1.8 GeV.

¹³	ABE 2001F reports their systematic errors $\pm 0.42 + 0.50 - 0.54 E - 4$ , where the second error is due to the theoretical uncertainty. We combine them in quadrature.

Except where otherwise noted, content of the 2024 Review of Particle Physics is licensed under a Creative Commons Attribution 4.0 International (CC BY 4.0) license. The publication of the Review of Particle Physics is supported by US DOE, MEXT (Japan), INFN (Italy) and CERN. Individual collaborators receive support for their PDG activities from their respective institutes or funding agencies. © 2024. See LBNL disclaimers.