scholarly journals MIRROR MATTER ADMIXTURES IN KS→γγ

2006 ◽  
Vol 21 (19n20) ◽  
pp. 4197-4207 ◽  
Author(s):  
G. SÁNCHEZ-COLÓN ◽  
A. GARCÍA
Keyword(s):  
Experimental Data ◽  
Theoretical Prediction ◽  
Mirror Symmetry ◽  
B Meson ◽  
Branching Ratio ◽  
New Physics ◽  
B Meson Decays ◽  
Mixing Angles ◽  
Meson Decays ◽  
Mirror Matter

The latest measurement of the KS→γγ branching ratio clearly shows an enhancement over the current theoretical prediction. As in other K and B meson decays, this invites to consider the possibility of the contribution of new physics. We study a particular form of the latter, which may be refered to as manifest mirror symmetry. The experimental data are described using previously determined values for the mixing angles of the admixtures of mirror matter in ordinary hadrons and by assuming that for π0, η, η′ → γγ, the mirror decay amplitudes have the same magnitudes as their ordinary counterparts.

scholarly journals FINAL STATE INTERACTIONS IN B → ππK AND $B\to K\overline{K}K$ DECAYS

2007 ◽  
Vol 22 (02n03) ◽  
pp. 645-648
Author(s):  
L. LEŚNIAK ◽  
R. KAMIŃSKI ◽  
B. EL-BENNICH ◽  
B. LOISEAU ◽  
A. FURMAN
Keyword(s):  
Experimental Data ◽  
Theoretical Model ◽  
Unitary Representation ◽  
B Meson ◽  
Final State ◽  
B Meson Decays ◽  
Meson Decays ◽  
Neutral B Meson ◽  
Final State Interactions

Analysis of charged and neutral B meson decays into π+π-K, K+K-K and [Formula: see text] is performed using a unitary representation of the ππ and [Formula: see text] final state interactions. Comparison of the theoretical model with the experimental data of the Belle and BaBar Collaborations indicates that charming penguin contributions are necessary to describe the B → f0(980) K and B → ρ(770)0 K decays.

RADIATIVE B MESON DECAYS AT BABAR

2005 ◽  
Vol 20 (02n03) ◽  
pp. 658-660
Author(s):  
FABIO BELLINI
Keyword(s):  
Storage Ring ◽  
B Meson ◽  
Branching Ratio ◽  
B Decays ◽  
Neutral Currents ◽  
B Meson Decays ◽  
Meson Decays ◽  
Flavor Changing ◽  
Rare B Decays ◽  
Babar Detector

Recent BaBar results on rare B decays involving flavor changing neutral currents are presented. New measurements of the CP asymmetries in b→sγ and B→K*γ decays are reported as well as B→K(*)l+l- and b→sl+l- branching ratio measurements. The data sample comprises [Formula: see text] decays collected with the BaBar detector at the PEP-II e+e- storage ring.

scholarly journals THE B→Xsl+l- AND B→Xsγ DECAYS WITH THE FOURTH GENERATION

1999 ◽  
Vol 14 (35) ◽  
pp. 2453-2462 ◽  
Author(s):  
CHAO-SHANG HUANG ◽  
WU-JUN HUO ◽  
YUE-LIANG WU
Keyword(s):  
B Meson ◽  
Branching Ratio ◽  
Branching Ratios ◽  
Fourth Generation ◽  
B Meson Decays ◽  
Meson Decays

If the fourth generation fermions exist, the new quarks could influence the branching ratios of the decays of B→Xsγ and B→Xsl+l-. We obtain two solutions of the fourth generation CKM factor [Formula: see text] from the decay of B→ Xsγ. We use these two solutions to calculate the new contributions of the fourth generation quark to Wilson coefficients of the decay of B→ Xsl+l-. The branching ratio and the forward–backward asymmetry of the decay of B→ Xsl+l- in the two cases are calculated. Our results are quite different from that of SM in one case, almost the same in another case. If Nature chooses the former, the B meson decays could provide a possible test of the fourth generation existence.

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.

scholarly journals DECAYS OF b HADRONS AND A POSSIBLE NEW FOUR-QUARK INTERACTION

2001 ◽  
Vol 16 (12) ◽  
pp. 2205-2214
Author(s):  
M. B. VOLOSHIN
Keyword(s):  
Scalar Field ◽  
B Mesons ◽  
B Meson ◽  
Branching Ratio ◽  
B Meson Decays ◽  
Meson Decays ◽  
Precise Data ◽  
B Hadrons ◽  
Quantum Numbers ◽  
Quark Interaction

A possibility is considered of explaining the low experimental value of the ratio of the lifetimes τ(Λb)/τ (Bd) by a new "centiweak" four-quark interaction, i.e. with a strength on the order of 10-2GF. It is noted that the considered interaction can also improve agreement with the data on low semileptonic branching ratio B sl (B) in B meson decays with a simultaneous slight decrease in the prediction for the average charm yield in those decays. The proposed new interaction modifies within the present experimental limits the predictions for differences of lifetimes among B mesons, and can thus be probed by more precise data on these differences. A sample model is briefly discussed, where the new interaction arises through a weak SU(2) singlet scalar field with quantum numbers of a diquark.

scholarly journals Non-leptonic B Meson Decays using Perturbative QCD

1999 ◽  
Vol 52 (6) ◽  
pp. 949
Author(s):  
Ciprian Dariescu ◽  
Marina-Aura Dariescu
Keyword(s):  
Experimental Data ◽  
Theoretical Model ◽  
Perturbative Qcd ◽  
B Meson ◽  
B Decays ◽  
B Meson Decays ◽  
Meson Decays ◽  
Model Predictions

Using perturbative QCD within the framework of Szczepaniak et al. (1990), we analyse different non-leptonic B decays, namely B → Π Π , B → Π (K)D, B → DD, as heavy-to-light transitions dominated by tree diagrams and compare our estimates to experimental data and other theoretical model predictions.

scholarly journals RADIATIVE AND ELECTROWEAK RARE B DECAYS

2004 ◽  
Vol 19 (06) ◽  
pp. 934-948 ◽  
Author(s):  
M. NAKAO
Keyword(s):  
B Meson ◽  
Dominant Role ◽  
Rare Decay ◽  
Neutral Current ◽  
New Physics ◽  
Beyond The Standard Model ◽  
B Meson Decays ◽  
Meson Decays ◽  
Flavor Changing ◽  
Flavor Changing Neutral Current

This report summarizes the latest experimental results on radiative and electroweak rare B meson decays. These rare decay processes proceed through the Flavor-Changing-Neutral-Current processes, and thus are sensitive to the postulated new particles in the theories beyond the Standard Model. Experiments at e+e- colliders, Belle, BaBar and CLEO, have been playing the dominant role, while the CDF and D0 experiments have just started to provide new results from Tevatron Run-II. The most significant achievement is the first observation of the decay B→K*ℓ+ℓ-, which opens a new window to search for new physics in B meson decays.

scholarly journals Searching new physics in rare B-meson decays into multiple muons

2019 ◽  
Vol 79 (5) ◽  
Author(s):  
Mikael Chala ◽  
Ulrik Egede ◽  
Michael Spannowsky
Keyword(s):  
B Meson ◽  
New Physics ◽  
B Meson Decays ◽  
Meson Decays
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