Measurement of the branching ratio for theΞ−→Σ−γ radiative decay

1994 ◽  
Vol 72 (6) ◽  
pp. 808-811 ◽  
Author(s):  
T. Dubbs ◽  
I. F. Albuquerque ◽  
N. F. Bondar ◽  
R. Carrigan ◽  
D. Chen ◽  
...  
Keyword(s):  
Radiative Decay ◽  
Branching Ratio

scholarly journals RADIATIVE DECAY ZH→γAH IN THE LITTLE HIGGS MODEL WITH T-PARITY

2011 ◽  
Vol 26 (32) ◽  
pp. 5349-5368 ◽  
Author(s):  
I. CORTÉS-MALDONADO ◽  
G. TAVARES-VELASCO
Keyword(s):  
Radiative Decay ◽  
Branching Ratio ◽  
Small Region ◽  
Higgs Model ◽  
Tree Level ◽  
Little Higgs ◽  
Precision Data ◽  
The One ◽  
Three Body ◽  
Electroweak Precision

In the little Higgs model with T-parity (LHTM), the only tree-level kinematically allowed two-body decay of the ZH boson can be the ZH→AHH decay and thus one-loop induced two-body decays may have a significant rate. We study the ZH→γAH decay, which is induced at the one-loop level by a fermion triangle and is interesting as it depends on the mechanism of anomaly cancelation of the model. All the relevant two- and three-body decays of the ZH gauge boson arising at the tree-level are also calculated. We considered a small region of the parameter space where f is still allowed to be as low as 500 GeV by electroweak precision data. We analyzed the scenario of a Higgs with a mass of 120 GeV. We found that the ZH→γAH branching ratio can be of the order of a tree-level three-body decay and may be at the reach of detection at the LHC for f close to 500 GeV, but it may be difficult to detect for f = 1 TeV . There is also an scenario where the Higgs boson has an intermediate mass such that the ZH→AHH decay is closed, the ZH→γAH gets considerably enhanced and the chances of detection get a large boost.

RADIATIVE TRANSITION $\Lambda _c^ + \to \sum ^ + _\gamma $

1993 ◽  
Vol 08 (05) ◽  
pp. 399-408 ◽  
Author(s):  
L. MAHARANA ◽  
A. NATH
Keyword(s):  
Quark Model ◽  
Significant Role ◽  
Radiative Decay ◽  
Branching Ratio ◽  
Radiative Transition

The radiative decay of [Formula: see text] is considered in a field theoretic quark model. It is found that the size of the baryon plays significant role and the branching ratio of the decay is highly suppressed by the order of factor 10−8.

Measurement of the branching ratio and asymmetry parameter for theΣ+→pγ radiative decay

1995 ◽  
Vol 51 (9) ◽  
pp. 4638-4660 ◽  
Author(s):  
S. Timm ◽  
I. F. Albuquerque ◽  
N. F. Bondar ◽  
R. Carrigan ◽  
D. Chen ◽  
...  
Keyword(s):  
Asymmetry Parameter ◽  
Radiative Decay ◽  
Branching Ratio

scholarly journals Physical constraints derived from FCNC in the 3-3-1-1 model

2021 ◽  
Vol 81 (9) ◽  
Author(s):  
Duy Nguyen Tuan ◽  
Takeo Inami ◽  
Huong Do Thi
Keyword(s):  
Lower Bound ◽  
Radiative Decay ◽  
Branching Ratio ◽  
New Physics ◽  
Decay Process ◽  
Tree Level ◽  
Gauge Bosons ◽  
Physical Constraints ◽  
Charged Higgs ◽  
Negligible Contribution

AbstractWe investigate several phenomena related to FCNCs in the $$\text {3-3-1-1}$$ 3-3-1-1 model. The sources of FCNCs at the tree-level from both the gauge and Higgs sectors are clarified. Experiments on the oscillation of mesons most stringently constrain the tree-level FCNCs. The lower bound on the new physics scale is imposed more tightly than in the previous, $$\text {M}_{\text {new}}>12 $$ M new > 12 TeV. Under this bound, the tree-level FCNCs make a negligible contribution to the $$\text {Br}(B_s \rightarrow \mu ^+ \mu ^-)$$ Br ( B s → μ + μ - ) , $$\text {Br}(B \rightarrow K^{*} \mu ^+ \mu ^-)$$ Br ( B → K ∗ μ + μ - ) and $$\text {Br}(B^{+}\rightarrow K^{+}\mu ^{+}\mu ^{-})$$ Br ( B + → K + μ + μ - ) . The branching ratio of radiative decay $$b \rightarrow s \gamma $$ b → s γ is enhanced by the ratio $$\frac{v}{u}$$ v u via diagrams with the charged Higgs mediation. In contrast, the charged currents of new gauge bosons significantly contribute to the decay process $$\mu \rightarrow e \gamma $$ μ → e γ .

scholarly journals THE BRANCHING RATIO OF RADIATIVE DECAY OF π+ MESONS

1960 ◽  
Vol 16 (5) ◽  
pp. 247
Author(s):  
CHEN YEN-FA ◽  
SONG YUH
Keyword(s):  
Radiative Decay ◽  
Branching Ratio

scholarly journals POSSIBLE HUGE ENHANCEMENT IN THE RADIATIVE DECAY OF THE WEAK W BOSON INTO A PION OR A CHARMED Ds MESON

1994 ◽  
Vol 09 (17) ◽  
pp. 1545-1556 ◽  
Author(s):  
Y.Y. KEUM ◽  
X.Y. PHAM
Keyword(s):  
Radiative Decay ◽  
W Boson ◽  
Rare Decay ◽  
Branching Ratio ◽  
Gauge Coupling ◽  
Great Accuracy ◽  
Boson Mass ◽  
Abelian Gauge ◽  
Decay Modes ◽  
Ds Meson

We point out that the rare decay modes [Formula: see text], [Formula: see text] could be very much enhanced, with a branching ratio around 10−6 which is some hundreds times larger than previous predictions. Its observation will determine the W boson mass with great accuracy, providing additional high precision test of the Standard Model, as well as reveal eventual deviation from the trilinear non-Abelian gauge coupling.

scholarly journals New upper limit for the branching ratio of theΩ−→Ξ−γ radiative decay

1994 ◽  
Vol 50 (1) ◽  
pp. R18-R20 ◽  
Author(s):  
I. F. Albuquerque@f ◽  
N. F. Bondar@f ◽  
R. Carrigan ◽  
D. Chen ◽  
P. S. Cooper@f ◽  
...  
Keyword(s):  
Radiative Decay ◽  
Branching Ratio ◽  
Upper Limit

WEAK RADIATIVE DECAY WIDTH OF Λb→Λγ DECAY

2001 ◽  
Vol 16 (31) ◽  
pp. 2013-2019
Author(s):  
A. K. MAITI ◽  
S. KOLA ◽  
D. P. BHATTACHARYYA
Keyword(s):  
Decay Width ◽  
Short Distance ◽  
Close Agreement ◽  
Radiative Decay ◽  
Photon Emission ◽  
Branching Ratio ◽  
Distance Effect ◽  
Long Distance ◽  
Effective Lagrangian ◽  
Quark Level

We have systematically analyzed the two-body weak radiative Λb→Λγ decay of bottom baryon. The weak radiative decay proceeds through W-exchange accompanied by a photon emission. Effective Lagrangian has been used for the W-exchange bremsstrahlung processes to estimate the long distance effect through pole. The short distance effect at the quark level (b→sγ) is also estimated here. With these predictions we have finally obtained the branching ratio of Λb→Λγ as Br (Λb→Λγ)=2.3×10-10 which is in close agreement with the experimental results.

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