Colour Octet Contribution in Exclusive P-Wave Charmonium Decay into Octet and Decuplet Baryons [PDF]
Eur.Phys.J.C14:643-671,2000, 1999 In the last years, the need of the colour octet state in inclusive P-wave charmonium decay has been firmly established. However, the implications of this in the corresponding exclusive reactions have not been fully recognized.
Wong, S. M. H.
core +5 more sources
Color-Octet Contributions to $J/\psi$ Photoproduction [PDF]
Phys.Rev.Lett.76:4128-4131,1996, 1996 We have calculated the leading color-octet contributions to the production of $J/\psi$ particles in photon-proton collisions. Using the values for the color-octet matrix elements extracted from fits to prompt $J/\psi$ data at the Tevatron, we demonstrate
A. Donnachie +30 more
core +3 more sources
Colour-octet NLO QCD corrections to hadronic $χ_J$ decays [PDF]
Phys.Lett.B380:159-164,1996, 1996 In this paper we present a complete next-to-leading order QCD calculation of the $\chi_J$ ($^3P_J\; ;J=0,1,2$) hadronic decay width. We include the NLO colour-octet contribution, as defined in the Bodwin, Braaten and Lepage formalism. We extract an estimate of the colour-octet parameter \height\ from the charmonium decay data.
Andrea Petrelli
arxiv +3 more sources
Radiative Upsilon Decay at the Endpoint [PDF]
Nucl.Phys.Proc.Suppl. 115 (2003) 183-186, 2002 The standard NRQCD power counting breaks down and the OPE gives rise to color-octet shape functions at the upper endpoint of the photon energy spectrum in radiative Upsilon decay.
Adam K. Leibovich +17 more
core +4 more sources
Octet baryon magnetic moments in light cone QCD sum rules [PDF]
Phys.Rev.D66:016002,2002; Erratum-ibid.D67:039901,2003, 2002 Octet baryon magnetic moments are calculated in framework of the light cone QCD sum rules. The analysis is carried for the general form of the interpolating currents for octet baryons.
Aliev, T. M., Ozpineci, A., Savci, M.
core +3 more sources
Singlet axial-vector coupling constant of the nucleon in QCD without instantons [PDF]
Physics Letters B, 2015 We have analyzed axial-vector current–current correlation functions between one-nucleon states to calculate the singlet axial-vector coupling constant of the nucleon.
Janardan P. Singh
doaj +4 more sources
Massive color-octet bosons and pairs of resonances at hadron colliders [PDF]
Phys.Lett.B670:119-123,2008, 2009 We analyze collider signatures of massive color-octet bosons whose couplings to quarks are suppressed. Gauge invariance forces the octets to couple at tree level only in pairs to gluons, with a strength set by the QCD gauge coupling.
Abe +33 more
core +2 more sources
Magnetic Moments of the SU(3) Octet Baryons in the semibosonized SU(3) Nambu-Jona-Lasinio Model [PDF]
, 1995 We investigate the magnetic moments of the SU(3) octet baryons in the framework of the $SU(3)$ semibosonized Nambu--Jona--Lasinio model. The rotational $1/N_c$ corrections and strange quark mass in linear order are taken into account.
A. Blotz +43 more
core +5 more sources
Octet negative parity to octet positive parity electromagnetic transitions in light cone QCD [PDF]
, 2014 Light cone QCD sum rules for the electromagnetic transition form factors among positive and negative parity octet baryons are derived. The unwanted contributions of the diagonal transitions among positive parity octet baryons are eliminated by combining ...
Aliev, T. M., Savci, M.
core +3 more sources
The Color Octet Effect from $e^+ e^-\to{J/\psi}+X+\gamma$ at B Factory [PDF]
, 2003 We study the initial state radiation process $e^+ e^-\to{J/\psi}+X+\gamma$ for $J/\psi$ production at B factory, and find the cross section is 61% larger than it's Born one for color octet part and is about half as it's Born one for color singlet part ...
Andrew T. S. Wee +6 more
core +3 more sources