scholarly journals HADRONIC DECAYS OF CHARMONIA FROM BESII

2005 ◽  
Vol 20 (02n03) ◽  
pp. 399-406
Author(s):  
◽  
CHANG-ZHENG YUAN
Keyword(s):  
Relative Phase ◽  
Hadronic Decays ◽  
Final States ◽  
Color Octet ◽  
Electromagnetic Decays ◽  
Color Octet Mechanism

Recent results on charmonia decays at BESII/BEPC are reported, including the observation of [Formula: see text], ψ′→Vector Tensor and ψ′→Vector Pseudoscalar for the measurement of the relative phase between the strong and electromagnetic decays of ψ′ and a test of the pQCD "12% rule" between ψ′ and J/ψ decays; the test of the color-octet mechanism via [Formula: see text] and [Formula: see text]; the first observation of χc0→f0(980)f0(980); and a study of the ψ′ and χcJ decays with [Formula: see text] in the final states.

scholarly journals Quarkonium Production at Z0 and in ϒ(1S) Decay

1997 ◽  
Vol 12 (22) ◽  
pp. 3931-3940
Author(s):  
Kingman Cheung ◽  
Wai-Yee Keung ◽  
Tzu Chiang Yuan
Keyword(s):  
Color Singlet ◽  
Fixed Target ◽  
Production Rates ◽  
Fixed Target Experiments ◽  
Color Octet ◽  
Quarkonium Production ◽  
Color Octet Mechanism

The conventional color-singlet model was challenged by the recent data on quarkonium production. Discrepancies in production rates were observed at the Tevatron, at LEP, and in fixed-target experiments. The newly advocated color-octet mechanism provides a plausible solution to the anomalous quarkonium production observed at the Tevatron. The color-octet mechanism should also affect other quarkonium production channels. In this paper we will summarize the studies of quarkonium production in Z0 and ϒ decays.

scholarly journals DALITZ ANALYSES: A TOOL FOR PHYSICS WITHIN AND BEYOND THE STANDARD MODEL

2006 ◽  
Vol 21 (27) ◽  
pp. 5503-5512 ◽  
Author(s):  
M. R. PENNINGTON
Keyword(s):  
Standard Model ◽  
Strong Coupling Regime ◽  
Hadronic Decays ◽  
Beyond The Standard Model ◽  
Final States ◽  
Matrix Elements ◽  
Final State ◽  
Ckm Matrix ◽  
The Standard Model ◽  
Final State Interactions

Dalitz analyses are introduced as the method for studying hadronic decays. An accurate description of hadron final states is critical not only to an understanding of the strong coupling regime of QCD, but also to the precision extraction of CKM matrix elements. The relation of such final state interactions to scattering processes is discussed.

scholarly journals Color-octet mechanism andJ/ψpolarization at CERN LEP

1997 ◽  
Vol 55 (11) ◽  
pp. 6839-6843 ◽  
Author(s):  
Seungwon Baek ◽  
P. Ko ◽  
Jungil Lee ◽  
H. S. Song
Keyword(s):  
Color Octet ◽  
Color Octet Mechanism

Identified final states in the hadronic decays of the Z

1996 ◽  
Vol 371 (1-2) ◽  
pp. 200-203
Author(s):  
R Campion ◽  
A De Angelis ◽  
B De Lotto ◽  
F Hahn ◽  
K Huet ◽  
...  
Keyword(s):  
Hadronic Decays ◽  
Final States

scholarly journals POWER SCALING RULES FOR CHARMONIA PRODUCTION AND HQEFT

2001 ◽  
Vol 16 (25) ◽  
pp. 4189-4206 ◽  
Author(s):  
MIGUEL-ANGEL SANCHIS-LOZANO
Keyword(s):  
Heavy Quark ◽  
Effective Field ◽  
Tree Level ◽  
Power Scaling ◽  
Color Octet ◽  
Heavy Quark Mass ◽  
Effective Lagrangian ◽  
Pair Annihilation ◽  
Color Octet Mechanism ◽  
Local Operators

We discuss the power scaling rules along the lines of a complete heavy quark effective field theory (HQEFT) for the description of heavy quarkonium production through a color-octet mechanism. To this end, we firstly derive a tree-level heavy quark effective Lagrangian keeping both particle–antiparticle mixed sectors allowing for heavy quark–antiquark pair annihilation and creation, but describing only low-energy modes around the heavy quark mass. Then we show the consistency of using HQEFT fields in constructing four-fermion local operators à la NRQCD, to be identified with standard color-octet matrix elements. We analyze some numerical values extracted from charmonia production by different authors and their hierarchy in the light of HQEFT.

scholarly journals Color-octet mechanism in the inclusive D-wave charmonium productions in B decays

1997 ◽  
Vol 395 (1-2) ◽  
pp. 107-112 ◽  
Author(s):  
Pyungwon Ko ◽  
Jungil Lee ◽  
H.S. Song
Keyword(s):  
B Decays ◽  
Color Octet ◽  
Color Octet Mechanism ◽  
D Wave

scholarly journals υ decay into charmonium and the color octet mechanism

1994 ◽  
Vol 320 (1-2) ◽  
pp. 145-151 ◽  
Author(s):  
Howard D. Trottier
Keyword(s):  
Color Octet ◽  
Color Octet Mechanism

scholarly journals Test of QCD at large Q2 with exclusive hadronic processes

2014 ◽  
Vol 31 ◽  
pp. 1460304
Author(s):  
Chengping Shen ◽  
Keyword(s):  
Perturbative Qcd ◽  
Cross Sections ◽  
Branching Fractions ◽  
Center Of Mass ◽  
Axial Vector ◽  
Hadronic Decays ◽  
Final States ◽  
Final State ◽  
The Cross ◽  
Using Data

My report consists of two parts: (1). Using samples of 102 million ϒ(1S) and 158 million ϒ(2S) events at Belle, we study 17 exclusive hadronic decays of these two bottomonium resonances to some Vector-Pseudoscalar (VP), Vector-Tensor (VT) and Axial-vector-Pseudoscalar (AP) processes and their final states. Branching fractions are measured for all the processes. The ratios of the branching fractions of ϒ(2S) and ϒ(1S) decays into the same final state are used to test a perturbative QCD (pQCD) prediction for OZI-suppressed bottomonium decays. (2). Using data samples of 89 fb-1, 703 fb-1, and 121 fb-1 collected at center-of-mass (CMS) energies 10.52, 10.58, and 10.876 GeV, respectively, we measure the cross sections of e+e- → ωπ0, [Formula: see text], and [Formula: see text]. The energy dependence of the cross sections is presented.

scholarly journals Color-octet mechanism inγ+p→Jψ+X

1996 ◽  
Vol 54 (7) ◽  
pp. 4312-4325 ◽  
Author(s):  
Pyungwon Ko ◽  
Jungil Lee ◽  
H. S. Song
Keyword(s):  
Color Octet ◽  
Color Octet Mechanism
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