Observation of $B^{0} \rightarrow p\bar{\Lambda} D^{(*)-}$ - INSPIRE

DataBETA

Observation of $B^{0} \rightarrow p\bar{\Lambda} D^{(*)-}$

Belle

Collaboration

Sep 10, 2015

8 pages

Published in:

Phys.Rev.Lett. 115 (2015) 22, 221803

Published: Nov 24, 2015

e-Print:

1509.03034 [hep-ex]

DOI:

10.1103/PhysRevLett.115.221803

PDG:

{{\mathit B}^{0}}

\rightarrow

{{\mathit p}}{{\overline{\mathit \Lambda}}}{{\mathit D}^{-}}

Report number:

BELLE-PREPRINT-2015-13,
KEK-PREPRINT-2015-22

Experiments:

KEK-BF-BELLE

View in:

reference search12 citations

Citations per year

Abstract: (APS)

We report the first observation of the decays B0→pΛ¯D(*)-. The data sample of 711 fb-1 used in this analysis corresponds to 772×106 BB¯ pairs, collected at the ϒ(4S) resonance by the Belle detector at the KEKB asymmetric-energy e+e- collider. We observe 19.8σ and 10.8σ excesses of events for the two decay modes and measure the branching fractions of B0→pΛ¯D- and B0→pΛ¯D*- to be (25.1±2.6±3.5)×10-6 and (33.6±6.3±4.4)×10-6, respectively, where the first uncertainties are statistical and the second are systematic. These results are not compatible with the predictions based on the generalized factorization approach. In addition, a threshold enhancement in the dibaryon (pΛ¯) system is observed, consistent with that observed in similar B decays.

Note:

16 pages, 3 figures and 3 tables, submitted to PRL

13.25.Hw
11.30.Er
12.15.Hh
electron positron: annihilation
electron positron: colliding beams
B0: pair production
B0: hadronic decay
threshold: enhancement
B0: branching ratio
Upsilon(10570): electroproduction

References(31)

Figures(8)

[1]

Observation of Inclusive $B$ Meson Decays Into $\Lambda(c$ )+ Baryons

ARGUS

Collaboration

•

H. Albrecht
(
- DESY
)

et al.

- Phys.Lett.B 210 (1988) 263-266
•
DOI:
- 10.1016/0370-2693(88)90383-8

[2]

Measurement of baryon production in B meson decay

CLEO

Collaboration

•

Glen D. Crawford
(
- Ohio State U.
)

et al.

- Phys.Rev.D 45 (1992) 752-770
•
DOI:
- 10.1103/PhysRevD.45.752

[3]

Review of Particle Physics

et al.

- Chin.Phys.C 38 (2014) 090001
•
DOI:
- 10.1088/1674-1137/38/9/090001

[4]

Observation of anti-B0 ---> D0(*) p anti-p

Belle

Collaboration

•

Kazuo Abe
(
- KEK, Tsukuba
)

et al.

- Phys.Rev.Lett. 89 (2002) 151802
•
e-Print:
- hep-ex/0205083
•
DOI:
- 10.1103/PhysRevLett.89.151802

[5]

Measurements of the Decays $B^0 \to \bar{D}^0 p \bar{p}$ , $B^0 \to \bar{D}$ * 0 $p \bar{p}$ , $B^0 \to D^{-} p \bar{p} \pi^{+}$ , and $B^0 \to D^{*-} p \bar{p} \pi^{+}$

BaBar

Collaboration

•

Bernard Aubert
(
- Annecy, LAPP
)

et al.

- Phys.Rev.D 74 (2006) 051101
•
e-Print:
- hep-ex/0607039
•
DOI:
- 10.1103/PhysRevD.74.051101

[6]

Observation of B0 ---> p anti-p K0 with a large K0 polarization

Belle

Collaboration

•

J.H. Chen
(
- Taiwan, Natl. Taiwan U.
)

et al.

- Phys.Rev.Lett. 100 (2008) 251801
•
e-Print:
- 0802.0336
•
DOI:
- 10.1103/PhysRevLett.100.251801

[7]

Study of B+ ---> p anti-p K+ and B+ ---> p anti-p pi+

Belle

Collaboration

•

J.T. Wei
(
- Taiwan, Natl. Taiwan U.
)

et al.

- Phys.Lett.B 659 (2008) 80-86
•
e-Print:
- 0706.4167
•
DOI:
- 10.1016/j.physletb.2007.11.063

[8]

Partial waves of baryon-antibaryon in three-body B meson decay

Mahiko Suzuki
(
- UC, Berkeley and
- LBL, Berkeley
)

- J.Phys.G 34 (2007) 283-298
•
e-Print:
- hep-ph/0609133
•
DOI:
- 10.1088/0954-3899/34/2/009

[9]

Study of the baryon-antibaryon low-mass enhancements in charmless three-body baryonic B decays

Belle

Collaboration

•

M.-Z. Wang
(
- Taiwan, Natl. Taiwan U.
)

et al.

- Phys.Lett.B 617 (2005) 141-149
•
e-Print:
- hep-ex/0503047
•
DOI:
- 10.1016/j.physletb.2005.05.008

[10]

Study of B+ ---> p anti-Lambda gamma, p anti-Lambda pi0 and B0 ---> p anti-Lambda pi-

Belle

Collaboration

•

M.-Z. Wang
(
- Taiwan, Natl. Taiwan U.
)

et al.

- Phys.Rev.D 76 (2007) 052004
•
e-Print:
- 0704.2672
•
DOI:
- 10.1103/PhysRevD.76.052004

[11]

Observation and study of the baryonic B-meson decays B to D(*) p pbar (pi) (pi)

BaBar

Collaboration

•

P. del Amo Sanchez
(
- Annecy, LAPP
)

et al.

- Phys.Rev.D 85 (2012) 092017
•
e-Print:
- 1111.4387
•
DOI:
- 10.1103/PhysRevD.85.092017

[12]

Charmful Three-body Baryonic B decays

Chun-Hung Chen
(
- Taiwan, Natl. Tsing Hua U.
)
,
Hai-Yang Cheng
(
- Taiwan, Inst. Phys.
)
,
C.Q. Geng
(
- Taiwan, Natl. Tsing Hua U.
)
,
Y.K. Hsiao
(
- Taiwan, Inst. Phys.
)

- Phys.Rev.D 78 (2008) 054016
•
e-Print:
- 0806.1108
•
DOI:
- 10.1103/PhysRevD.78.054016

[13]

Hereafter, the inclusion of the charge-conjugate mode is implied

[14]

Observation of $B^- \to \bar{p} \Lambda D^0$ at Belle

Belle

Collaboration

•

P. Chen
(
- Taiwan, Natl. Taiwan U.
)

et al.

- Phys.Rev.D 84 (2011) 071501
•
e-Print:
- 1108.4271
•
DOI:
- 10.1103/PhysRevD.84.071501

[15]

Observation of a near threshold enhancement in th p anti-p mass spectrum from radiative J / psi ---> gamma p anti-p decays

BES

Collaboration

•

J.Z. Bai

et al.

- Phys.Rev.Lett. 91 (2003) 022001
•
e-Print:
- hep-ex/0303006
•
DOI:
- 10.1103/PhysRevLett.91.022001

[16]

Observation of a resonance X(1835) in J / psi -> gamma pi+ pi- eta-prime

BES

Collaboration

•

M. Ablikim
(
- Beijing, Inst. High Energy Phys.
)

et al.

- Phys.Rev.Lett. 95 (2005) 262001
•
e-Print:
- hep-ex/0508025
•
DOI:
- 10.1103/PhysRevLett.95.262001

[17]

Study of $\psi(2S)$ Decays to $\gamma p \bar{p}$ , $\pi^0 p \bar{p}$ and $\eta p \bar{p}$ and Search for $p \bar{p}$ Threshold Enhancements

CLEO

Collaboration

•

J.P. Alexander
(
- Cornell U., Phys. Dept.
)

et al.

- Phys.Rev.D 82 (2010) 092002
•
e-Print:
- 1007.2886
•
DOI:
- 10.1103/PhysRevD.82.092002

[18]

Observation of B- ---> J/psi Lambda anti-p and searches for B- ---> J/psi Sigma0 anti-p and B0 ---> J/psi p anti-p decays

Belle

Collaboration

•

Q.L. Xie
(
- Beijing, Inst. High Energy Phys.
)

et al.

- Phys.Rev.D 72 (2005) 051105
•
e-Print:
- hep-ex/0508011
•
DOI:
- 10.1103/PhysRevD.72.051105

[19]

Observation of B+ ---> Lambda(c)+ Lambda(c)- K+ and B0 ---> Lambda(c)+ Lambda(c)- K0 decays

Belle

Collaboration

•

Kazuo Abe
(
- KEK, Tsukuba
)

et al.

- Phys.Rev.Lett. 97 (2006) 202003
•
e-Print:
- hep-ex/0508015
•
DOI:
- 10.1103/PhysRevLett.97.202003

[20]

Angular distributions in three-body baryonic B decays

- Phys.Rev.D 74 (2006) 094023
•
e-Print:
- hep-ph/0606141
•
DOI:
- 10.1103/PhysRevD.74.094023

[21]

Overview of the KEKB accelerators

S. Kurokawa
(
- KEK, Tsukuba
)
,
Eiji Kikutani
(
- KEK, Tsukuba
)

- Nucl.Instrum.Meth.A 499 (2003) 1-7
•
DOI:
- 10.1016/S0168-9002(02)01771-0

[22]

Achievements of KEKB

et al.

- PTEP 2013 (2013) 03A001
•
DOI:
- 10.1093/ptep/pts102

[23]

The Belle Detector

Belle

Collaboration

•

A. Abashian

et al.

- Nucl.Instrum.Meth.A 479 (2002) 117-232
•
DOI:
- 10.1016/S0168-9002(01)02013-7

[24]

Physics Achievements from the Belle Experiment

Belle

Collaboration

•

Jolanta Brodzicka
(
- Cracow, INP
)

et al.

- PTEP 2012 (2012) 04D001
•
e-Print:
- 1212.5342
•
DOI:
- 10.1093/ptep/pts072

[25]

Belle PID

E. Nakano
(
- Osaka City U.
)

- Nucl.Instrum.Meth.A 494 (2002) 402-408
•
DOI:
- 10.1016/S0168-9002(02)01510-3

1-25 of 31
1
2
25 / page