scholarly journals Angular distribution and rotations of frame in vector meson decays into lepton pairs

2011 ◽  
Vol 83 (3) ◽  
Author(s):  
Sandro Palestini
Keyword(s):  
Angular Distribution ◽  
Vector Meson ◽  
Lepton Pairs ◽  
Meson Decays

e+ e- ANNIHILATION INTO $\overline{N}N$ PAIRS

2003 ◽  
Vol 18 (02n06) ◽  
pp. 370-373 ◽  
Author(s):  
Y. YAN ◽  
C. KOBDAJ ◽  
W. UCHAI ◽  
AMAND FAESSLER ◽  
T. GUTSCHE ◽  
...  
Keyword(s):  
Experimental Data ◽  
Vector Meson ◽  
Quark Model ◽  
Step Process ◽  
Meson Decays ◽  
Quantum Numbers ◽  
One Step ◽  
The One

The reactions of electron-position annihilation into nucleon-antinucleon pairs have been studied in a nonperturbative quark model. The work suggests that the two-step process, in which the primary [Formula: see text] pair forms first a meson and then the meson decays into baryon pair, is dominant over the one-step process in which the primary [Formula: see text] pair is directly dressed by two additional [Formula: see text] pairs to form a baryon pair. The experimental data indicates that there exists a vector meson with quantum numbers IG(JPC) = 0-(1--) and a mass around 2 GeV.

TheSU 6 algebra of currents and vector meson decays

1966 ◽  
Vol 45 (2) ◽  
pp. 426-435 ◽  
Author(s):  
G. Altarelli
Keyword(s):  
Vector Meson ◽  
Meson Decays

Angular distribution of lepton pairs in perturbative QCD

1981 ◽  
Vol 101 (4) ◽  
pp. 267-270 ◽  
Author(s):  
T. Grandou ◽  
J.L. Meunier ◽  
G. Plaut
Keyword(s):  
Angular Distribution ◽  
Perturbative Qcd ◽  
Lepton Pairs

Angular distribution of lepton-pairs and QCD

1979 ◽  
Vol 80 (4-5) ◽  
pp. 385-389 ◽  
Author(s):  
J. Cleymans ◽  
M. Kuroda
Keyword(s):  
Angular Distribution ◽  
Lepton Pairs

Determination of sin2θw from angular distribution of lepton pairs from Z decay

1989 ◽  
Vol 233 (1-2) ◽  
pp. 256-258 ◽  
Author(s):  
P. Chiappetta ◽  
J.Ph. Guillet
Keyword(s):  
Angular Distribution ◽  
Lepton Pairs

scholarly journals STUDY OF CP VIOLATION IN $\Lambda_c^+$ DECAY

2011 ◽  
Vol 26 (15) ◽  
pp. 2523-2535 ◽  
Author(s):  
XIAN-WEI KANG ◽  
HAI-BO LI ◽  
GONG-RU LU ◽  
ALAKABHA DATTA
Keyword(s):  
Angular Distribution ◽  
Cp Violation ◽  
Vector Meson ◽  
Higgs Doublet ◽  
New Physics ◽  
Angular Analysis ◽  
The Standard Model ◽  
Helicity Amplitudes ◽  
Doublet Model ◽  
Two Higgs Doublet Model

In this paper, we study CP violation in [Formula: see text] and [Formula: see text] decays, where B, P and V denote a light spin-½ baryon, pseudoscalar and a vector meson respectively. In these processes the T odd CP violating triple-product (TP) correlations are examined. The genuine CP violating observables which are composed of the helicity amplitudes occurring in the angular distribution are constructed. Experimentally, by performing a full angular analysis it is shown how one may extract the helicity amplitudes and then obtain the TP asymmetries. We estimate the TP asymmetries in [Formula: see text] decays to be negligible in the Standard Model making these processes an excellent place to look for new physics. Taking a two-Higgs doublet model, as an example of new physics, we show that large TP asymmetries are possible in these decays. Finally, we discuss how BES-III and super τ-charm experiments will be sensitive to these CP violating signals in [Formula: see text] decays.

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