scholarly journals XYZ at Belle

2019 ◽  
Vol 212 ◽  
pp. 02006
Author(s):  
Jens Sören Lange
Keyword(s):  
Branching Fraction ◽  
Heavy Quarks ◽  
Meson Decays ◽  
Exotic States ◽  
The Absolute

Recent results of exotic states with heavy quarks, denoted as XYZ states, are presented. The results include searches for the Y(4260) in B meson decays, a spin partner of Y(4630), and the strange Pentaquark $ P_s^ + $. An addition, the measurements of the absolute branching fraction of X(3872) and search for double Zc production is dicussed.

scholarly journals Measurement of the absolute branching fraction of Λc+→pKS0η decays

2021 ◽  
Vol 817 ◽  
pp. 136327
Author(s):  
M. Ablikim ◽  
M.N. Achasov ◽  
P. Adlarson ◽  
S. Ahmed ◽  
M. Albrecht ◽  
...  
Keyword(s):  
Branching Fraction ◽  
The Absolute

scholarly journals Measurement of the absolute branching fraction of inclusive semielectronic Ds+ decays

2021 ◽  
Vol 104 (1) ◽  
Author(s):  
M. Ablikim ◽  
M. N. Achasov ◽  
P. Adlarson ◽  
S. Ahmed ◽  
M. Albrecht ◽  
...  
Keyword(s):  
Branching Fraction ◽  
The Absolute

scholarly journals XYZ states as hadronic molecules

2019 ◽  
Vol 202 ◽  
pp. 01002
Author(s):  
A.V. Nefediev
Keyword(s):  
Heavy Quarks ◽  
Exotic States ◽  
The Past ◽  
Quark Models ◽  
Molecule Model

In the past decade, a lot of new hadrons containing heavy quarks were discovered which do not fit into the scheme provided by the traditional quark models. Such states are known as the XYZ states and they are conventionally referred to as exotic ones. At present, there is no consensus on their nature, and different models and approaches have been suggested to explain their unusual properties. The talk is devoted to a brief overview of the molecule model for such exotic states.

scholarly journals Measurement of the Absolute Branching Fraction of the Inclusive Semileptonic Λc+ Decay

2018 ◽  
Vol 121 (25) ◽  
Author(s):  
M. Ablikim ◽  
M. N. Achasov ◽  
S. Ahmed ◽  
M. Albrecht ◽  
M. Alekseev ◽  
...  
Keyword(s):  
Branching Fraction ◽  
The Absolute

Branching Ratio and CP Asymmetry in b→sγ and the Study of Exclusive Radiative B Meson Decays at CLEO

2001 ◽  
Vol 16 (supp01b) ◽  
pp. 632-635
Author(s):  
◽  
Jana B. Thayer
Keyword(s):  
B Meson ◽  
Branching Fraction ◽  
Branching Ratio ◽  
Cp Asymmetry ◽  
B Meson Decays ◽  
Significant Evidence ◽  
Meson Decays ◽  
A Value ◽  
Penguin Decays

We have investigated radiative B meson decays with the CLEO detector. An updated result on the branching fraction ℬ(b→sγ)=(3.15±0.35±0.32 ±0.26)×10-4 is reported. We report on a search for CP asymmetry in b→sγ decays, determining that -0.27<ACP<+0.010 at 90% CL. The measurement of the branching fraction for the exclusive mode B→K*(892)γ has been updated with a value of [Formula: see text] and [Formula: see text] and a first measurement of [Formula: see text] is reported with a value of [Formula: see text]. A search for CP asymmetry in B→K*(892)γ decays yields a measurement of ACP=+0.08±0.13±0.03. We find no significant evidence for the decays B→(ρ/ω)γ and we limit ℬ(B →(ρ/ω)γ)/ℬ(B→K*(892)γ)<0.32 at 90% CL. In addition we find no evidence for the non-penguin decays B0→ϕγ and B0→D*0γ.

Upper limit on the absolute branching fraction forDs+→φπ+

1990 ◽  
Vol 64 (2) ◽  
pp. 169-171 ◽  
Author(s):  
J. Adler ◽  
Z. Bai ◽  
G. T. Blaylock ◽  
T. Bolton ◽  
J.-C. Brient ◽  
...  
Keyword(s):  
Branching Fraction ◽  
Upper Limit ◽  
The Absolute

Rare B meson decays to charmed final states at Belle $(B\to D^{(*)} K^-, B^0\to D^+_s \pi^-)$

2001 ◽  
Vol 16 (supp01a) ◽  
pp. 464-467
Author(s):  
◽  
Yangheng Zheng
Keyword(s):  
B Meson ◽  
Branching Fraction ◽  
Final States ◽  
B Meson Decays ◽  
Meson Decays ◽  
Belle Detector ◽  
Upper Limit ◽  
Cabibbo Suppressed

We report observations of the Cabibbo-suppressed decays B→ D(*)K and an upper limit for the decay branching fraction for [Formula: see text] using a 5.3fb-1 data sample accumulated at the ϒ(4S) resonance with the Belle detector at the KEKB e+e- asymmetric collider.

Measurement of the absolute inclusive leptonic-decay branching fraction of theDs+meson

1990 ◽  
Vol 65 (6) ◽  
pp. 686-689 ◽  
Author(s):  
Z. Bai ◽  
G. T. Blaylock ◽  
T. Bolton ◽  
J.-C. Brient ◽  
T. Browder ◽  
...  
Keyword(s):  
Branching Fraction ◽  
Leptonic Decay ◽  
The Absolute

scholarly journals First Measurement of the Absolute Branching Fraction of Λ→pμ−ν¯μ

2021 ◽  
Vol 127 (12) ◽  
Author(s):  
M. Ablikim ◽  
M. N. Achasov ◽  
P. Adlarson ◽  
S. Ahmed ◽  
M. Albrecht ◽  
...  
Keyword(s):  
Branching Fraction ◽  
The Absolute
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