Highlights in light-baryon spectroscopy and searches for gluonic excitations

The spectrum of excited hadrons - mesons and baryons - serves as an excellent probe of quantum chromodynamics (QCD), the fundamental theory of the strong interaction. The strong coupling however makes QCD challenging. It confines quarks and breaks chiral symmetry, thus providing us with the world of light hadrons. Highly-excited hadronic states are sensitive to the details of quark confinement, which is only poorly understood within QCD. This is the regime of non-perturbative QCD and it is one of the key issues in hadronic physics to identify the corresponding internal degrees of freedom and how they relate to strong coupling QCD. The quark model suggests mesons are made of a constituent quark and an antiquark and baryons consist of three such quarks. QCD predicts other forms of matter. What is the role of glue? Resonances with large gluonic components are predicted as bound states by QCD. The lightest hybrid mesons with exotic quantum numbers are estimated to have masses in the range from 1 to 2 GeV/c2 a...

[1]  M. Kube,et al.  N(1520) 3/2(-) helicity amplitudes from an energy-independent multipole analysis based on new polarization data on photoproduction of neutral pions. , 2014, Physical review letters.

[2]  R. Schumacher,et al.  Spin and parity measurement of the Λ (1405) baryon , 2014, 1402.2296.

[3]  V. Crede,et al.  Progress towards understanding baryon resonances , 2013, Reports on progress in physics. Physical Society.

[4]  R. Edwards,et al.  Flavor structure of the excited baryon spectra from lattice QCD , 2012, 1212.5236.

[5]  W. Meyer,et al.  Well-established nucleon resonances revisited by double-polarization measurements. , 2012, Physical review letters.

[6]  J. Pierce,et al.  The Jefferson Lab Frozen Spin Target , 2012, 1204.1250.

[7]  E. Klempt,et al.  Properties of baryon resonances from a multichannel partial wave analysis , 2011, 1112.4937.

[8]  U. Nucamendi,et al.  Reconstruction of the interaction term between dark matter and dark energy using SNe Ia, BAO, CMB, H(z) and X-ray gas mass fraction , 2011, 1109.1303.

[9]  R. Workman,et al.  Updated SAID analysis of pion photoproduction data , 2011, 1109.0722.

[10]  E. Klempt,et al.  Nucleon resonances in the fourth-resonance region , 2011, 1109.0970.

[11]  F. T. Collaboration,et al.  Helicity Asymmetry in gamma p -> pi+ n with FROST , 2011, 1108.3050.

[12]  J. Dudek.  The lightest hybrid meson supermultiplet in QCD , 2011, 1106.5515.

[13]  R. Edwards,et al.  Excited state baryon spectroscopy from lattice QCD , 2011, Lattice 2011 - The 29th International Symposium on Lattice Field Theory, Squaw Valley, Lake Tahoe, CA, USA, July 11, 2011.

[14]  Christopher E. Thomas,et al.  Isoscalar meson spectroscopy from lattice QCD , 2011, 1102.4299.

[15]  E. Klempt,et al.  P -wave excited baryons from pion- and photo-induced hyperon production , 2010, 1009.4803.

[16]  V. Crede,et al.  Measurements of the Polarization Observables I[sup s] and I[sup c] for γ[sup →]p→pπ[sup +]π[sup −] using the CLAS Spectrometer , 2010 .

[17]  Cmu,et al.  Status of exotic-quantum-number mesons , 2010, 1004.5516.

[18]  E. Klempt,et al.  Photoproduction of pions and properties of baryon resonances from a Bonn-Gatchina partial-wave analysis , 2010 .

[19]  S. U. Chung,et al.  Observation of a J(PC)=1-+ exotic resonance in diffractive dissociation of 190   GeV/c π- into π- π- π+. , 2010, Physical review letters.

[20]  E. al.,et al.  Partial Wave Analysis of the Reaction γp → pω and the Search for Nucleon Resonances , 2009, 0908.2911.

[21]  C. Hanhart,et al.  Analytic properties of the scattering amplitude and resonances parameters in a meson exchange model , 2009, 0903.4337.

[22]  C. Hanhart,et al.  The role of the background in the extraction of resonance contributions from meson–baryon scattering , 2009, 0903.1781.

[23]  E. al.,et al.  π+ photoproduction on the proton for photon energies from 0.725 to 2.875 GeV , 2009, 0903.1110.

[24]  T. Sato,et al.  Dynamical Models of the Excitations of Nucleon Resonances , 2009, 0902.3653.

[25]  E. Klempt,et al.  Baryon spectroscopy , 2009, 0901.2055.

[26]  M. Marshak,et al.  The experimental status of glueballs , 2008, 0812.0600.

[27]  O. University,et al.  Dynamical coupled-channel model of meson production reactions in the nucleon resonance region , 2006, nucl-th/0608051.

[28]  S. Sarkar,et al.  Erratum to: “Baryonic resonances from baryon decuplet-meson octet interaction” [Nucl. Phys. A 750 (2005) 294] , 2006 .

[29]  R. Workman,et al.  Extended partial-wave analysis of piN scattering data , 2006, nucl-th/0605082.

[30]  A. Sarantsev,et al.  Partial decay widths of baryons in the spin-momentum operator expansion method , 2006, hep-ph/0605135.

[31]  R. Kunne,et al.  Evidence for nucleon-resonance excitation in omega-meson photoproduction. , 2006, Physical review letters.

[32]  W. Roberts,et al.  Polarization observables for two-pion production off the nucleon , 2004, nucl-th/0410012.

[33]  E. Oset,et al.  Baryonic resonances from Baryon decuplet-meson octet interactions and the exotic resonance S=1, I=1, J(P)=3/2(-) , 2004, nucl-th/0501027.

[34]  E. Klempt,et al.  Partial-wave decomposition of pion and photoproduction amplitudes , 2004 .

[35]  U. Mosel,et al.  Spin-$\frac{5}{2}$ resonance contributions to the pion-induced reactions for energies $\sqrt{s} \leq 2.0$ GeV , 2004, nucl-th/0403064.

[36]  R. Workman,et al.  The Said PWA Program , 2003 .

[37]  A. Sibirtsev,et al.  Systematic Regge theory analysis of omega photoproduction , 2003, nucl-th/0301015.

[38]  J. Maldacena,et al.  Large N Field Theories, String Theory and Gravity , 1999, hep-th/9905111.

[39]  A. Donnachie,et al.  Exclusive vector photoproduction: confirmation of Regge theory , 1999, hep-ph/9912312.

[40]  L. Tiator,et al.  A unitary isobar model for pion photo- and electroproduction on the proton up to 1 GeV , 1998, nucl-th/9807001.

[41]  Wen-Tai Chiang,et al.  Completeness rules for spin observables in pseudoscalar meson photoproduction , 1996, nucl-th/9611053.

[42]  A. Donnachie,et al.  Exclusive vector meson production at HERA , 1994, hep-ph/9411368.

[43]  A. Donnachie,et al.  Complete experiments in pseudoscalar photoproduction , 1975 .