HaPhy 2011-8 QCD and Few-Body Systems 20 August 2011, International Conference Hall, Korea Aerospace University, Korea

Organizing committee Prof. B. G. Yu (Korea Aerospace University, Workshop chair) Prof. K. S. Kim (Korea Aerospace University) Prof. Y. Oh (Kyungpook National University) Dr. S. i. Nam (Korea Aerospace University)

Scientific program ►Session I (Chair: B. G. Yu) 10:00 ~ 10:30 Reception and registration 10:30 ~ 10:40 Opening remarks (Workshop chair, B. G. Yu) 10:40 ~ 11:40 F. Gross (Jlab, USA) 11:40 ~ 12:20 M. K. Cheoun (Soongsil Univ., Korea) 12:20 ~ 14:00 Official photo and lunch

►Session II (Chair: K. S. Kim) 14:00 ~ 15:00 A. Hosaka (RCNP, Japan) 15:00 ~ 15:40 C. H. Hyun (Daegu Univ., Korea) 15:40 ~ 16:40 B. S. Zou (IHEP, China) 16:40 ~ 17:00 Coffee break

►Session III (Chair: Y. Oh) 17:00 ~ 18:00 C. W. Kao (CYCU, Taiwan) 18:00 ~ 18:40 W. Kim (Kyungpook Nat’l Univ., Korea) 19:00 ~ 21:00 Workshop dinner (KAU main building)

Sponsors Korea Aerospace University (KAU) Asia Pacific Center for Theoretical Physics (APCTP)

Abstract Treatment of Few-Body problems using the Covariant Spectator Theory: A short review Franz Gross1,2 1. Thomas Jeerson National Accelerator Facility, Newport News, Virginia 23606, USA and 2. College of William and Mary, Williamsburg, Virginia 23185, USA The Covariant Spectator Theory (CST), a general eld-theory based method for the calculation of few-body observables [1], as been applied to the description of two and three nucleon problems and to few quark systems. It is manifestly covariant and preserves current conservation, even when phenomenological form factors are used at the vertices that govern the dynamics [2]. In this mini review, I will describe the theoretical basis for the method, show how current is conserved, and review recent results. The emphasis will be on (i) recent precise ts to low energy NN scattering [3, 4] and the description of the triton binding without three body forces [5], (ii) the covariant description of mesons as quark-antiquark pairs with connement, and (iii) phenomenological description of deep inelastic scattering from nucleons. [1] [2] [3] [4] [5]

F. Gross, Phys. Rev. 186, 1448 (1969); D10, 223 (1974); C26, 2203 (1982). F. Gross, D. O. Riska, Phys. Rev. C36, 1928 (1987). F. Gross, A. Stadler, Phys. Rev. C78, 014005 (2008). F. Gross, A. Stadler, Phys. Rev. C82, 034004 (2010). A. Stadler, F. Gross, Phys. Rev. Lett. 78, 26-29 (1997).

Charge Exchange Reactions and Applications to Astrophysics Myung-Ki Cheoun Soongsil University, Korea In the Quasi-particle RPA(QRPA) framework, we calculated various charge exchange reactions, such as beta decays, (n,p) capture reactions, and neutrino reactions via charge and neutral currents. These reactions play important roles on the rapid- and slow- neutron process, and neutrino process in the core-collapsing supernovae in cosmos. I am going to discuss their roles in the interpretation of the nuclear abundances of proton-nuclei, such as 130La, 180Ta and 92Nb. Their astrophysical origins turn out to strongly related to the neutrino process. Network calculations by the solar model will be also presented with final abundances.

Hadronic composite states and their mixing with elementary components Atsushi Hosaka Research Center for Nuclear Physics, Osaka University, Japan In this talk we discuss recent theoretical studies on hadronic composite states induced by the tensor force of one pion exchange. We find several bound and resonant states near threshold regions. These states survive by the coupled channel mechanism as much like that in the deuteron binding. Yet, in some cases we might have to consider their mixing with non-composite components which are elementary or the CDD pole like in the scattering theory. We show how the mixing becomes important as a function of QCD parameters, especially the color number Nc. Examples are show for the axial vector meson a 1.

Electroexcitation of nucleon resonance for 1.7 < Q 2 < 4.5 GeV2 in pol e p → e n π + W. Kim (CLAS Collaboration) Kyungpook National University, Korea The exclusive electroproduction process pol e p → e n π + was measured in the range of the photon virtuality Q2 = 1.7-4.5 GeV2, and the invariant mass range for the n π + system of W =1.15-1.7 GeV 2 using the CEBAF Large Acceptance Spectrometer. These kinematics are probed in exclusive π + production from protons with nearly full coverage in the azimuthal and polar angles of the nπ + center-of-mass system. In this experiment over 32,000 cross sections and over 4,000 asymmetry data points were measured. Results will be presented on the electroexcitation of the low mass resonances Δ(1232)P33, N(1440)P11, N(1520)D13, and N(1535)S11 in this wide range of kinematics.

Five-quark components in baryons Bing-Song Zou Institute of High Energy Physics, CAS, China Evidence has been accumulating for the existence of significant intrinsic nonperturbative five-quark components in various baryons. The inclusion of the five-quark components gives a natural explanation of the excess of dbar over ubar, significant quark orbital angular momentum in the proton, the problematic mass and decay pattern of the lowest ½ --baryon nonet, etc.. A breathing mode of qqq → qqqq qbar is suggested for the lowest 1/2-baryon octet. Prediction for existence of super-heavy excited nucleon and hyperon resonances above 4 GeV is introduced.

Review of Two-Boson Exchange Physics Chung-Wen Kao Chung-Yuan Christian University, Taiwan I would like to make a personal review of the two-boson exchange physics. I will focus on its impact on the extraction of several important physical observables such as EM form factors, strange vector form factors and the weak charge.

Spin observables in d γ→ n p at low energies Chang Ho Hyun Daegu University, Korea We investigate the polarization of outgoing neutrons in photo-disintegration of the deuteron at low energies. Polarization of the neutron along its momentum, P y’ depends on the strong interactions of the neutron and the proton, and electromagnetic transition operators. On the other hand, polarizations perpendicular to the direction of the neutron, Px’ and Pz’ depend on parity-violating interactions as well as strong and electromagnetic ones. In this work, we employ a pionless effective field theory with dibaryon fields. Both parity-conserving and parityviolating amplitudes are calculated up to next-to-leading order, and we investigate the angle distribution and energy dependence of parity-conserving (P y’) and parity-violating (Px’ , Pz’) polarizations. For Py’, we compare the results with experiments, and argue the discrepancy between them. For P x’ and Pz’, we discuss the implication of the results in determining the parity-violating low energy constants.

Workshop site

KAU main building Main gate

International Conference hall

How to get to KAU From Incheon airport by subway Take AREX train at Incheon airport → Get off at Digital Media City (DMC) station then take the subway Gyeongui line bound for Munsan → Get off at Hwajeon station (KAU station) From Kimpo airport by subway Take AREX train at Kimpo airport → Get off at Digital Media City (DMC) station then take the subway Gyeongui line bound for Munsan → Get off at Hwajeon station (KAU station) AREX train information site (English, Japanese, and Chinese) http://english.arex.or.kr/jsp/eng/index.jsp http://japan.arex.or.kr/jsp/jap/index.jsp http://china.arex.or.kr/jsp/chi/index.jsp

How to get to Millennium hotel for foreign participants From Incheon airport by subway Take AREX train at Incheon airport → Get off at Digital Media City (DMC) station then take the subway Gyeongui line bound for Munsan → Get off at Daegok station then take the subway line #3 bound for Daehwa → Get off at Daehwa station and use #1 exit From Kimpo airport by subway Take AREX train at Kimpo airport → Get off at Digital Media City (DMC) station then take the subway Gyeongui line bound for Munsan → Get off at Daegok station then take the subway line #3 bound for Daehwa → Get off at Daehwa station and use #1 exit

From Incheon airport by bus Take AREX train at Incheon airport then get off at Kimpo airport station → Take shuttle bus from international-line building to domestic-line building → Take bus #150 at #7 stop in front of the domestic-line building → Get off at Daewha stop From Incheon airport by Subway and Taxi Take AREX train at Incheon airport then get off at Kimpo airport station → Take a taxi to go to Daewha station of #3 subway line You may show the followings to the taxi driver: 3호선 대화역 까지 가주십시오 (To Daehwa station). 대화역 근처 밀레니엄 호텔까지 가주십시오 (To Millennium hotel). The taxi fair would be about 20,000 KRW (20 USD)

No.3 subway line Daewha station No.1 exit

Millennium hotel

Domestic emergency call 010-2952-1723 (Seung-il Nam)