The 8th International Workshop on Chiral Dynamics 2015

Session

Parallel Session 6 - Few-Body Physics WG

2 Jul 2015, 16:20

Building E, Polo Fibonacci (Pisa)

Conveners

Parallel Session 6 - Few-Body Physics WG

• Akaki Rusetsky (HISKP, University of Bonn)
• Assumpta Parreno Garcia (University of Barcelona)
• Dean Lee (North Carolina State University)

14. Precise calculations of the deuteron quadrupole moment

Franz Gross (Jefferson Lab)

02/07/2015, 16:20

Few-Body Physics Working Group

Talk

Until recently, precision calculations of the deuteron quadrupole moment, Qd, have consistently under-predicted its value by several percent, leaving the calculation of this quantity an "unresolved problem" in few body physics. I will report on two recent calculations that predict Qd to better than 1%. One of these uses chiral effective field theory and the other uses the covariant spectator...

92. Subtractive renormalization and scaling in low-energy few-body physics

Lauro Tomio (Federal University of ABC, Sao Paolo)

02/07/2015, 16:35

Few-Body Physics Working Group

Talk

Renormalized fixed-point Hamiltonians are formulated for systems described by interactions that originally contain point-like singularities (as the Dirac-delta and/or its derivatives). They express the renormalization group invariance of quantum mechanics. The approach has been applied in the study low-energy scattering observables, such as the nucleon-nucleon interaction with one pion...

33. Nuclear electric dipole moment of light nuclei in the gaussian expansion method

Nodoka Yamanaka (iTHES Research Group, RIKEN)

02/07/2015, 16:50

Few-Body Physics Working Group

Talk

The nuclear electric dipole moment is a very sensitive probe of CP violation beyond the standard model, and for light nuclei, it can be evaluated accurately using the few-body calculational methods. In this work, we evaluate the electric dipole moment of the deuteron, $^3$He, $^3$H, $^6$Li, and $^9$Be in the Gaussian expansion method with realistic nuclear force, and assuming the one-meson...

86. Study of the electroweak processes in the two and three-nucleon systems with local chiral forces.

Roman Skibinski (Jagiellonian University, Krakow)

02/07/2015, 17:05

Few-Body Physics Working Group

Talk

In the recent decade the chiral Effective Field Theory (χEFT) has proven its predictive power in low energy nuclear physics. Within this approach the two- and three-nucleon (3N) forces have been derived perturbatively in a consistent manner [1,2]. The three-nucleon force (3NF) occurs for the first time at the next-to-next-to leading order (N2LO) of chiral expansion. Inclusion of N2LO 3NF to...

28. Compton scattering from 3He and 4He using an active target

John Annand (University of Glasgow)

02/07/2015, 17:20

Few-Body Physics Working Group

Talk

An experiment to measure the differential cross section for Compton scattering from 3He and 4He at the MAMI tagged photon facility in Mainz is described. The objective is to measure the isoscalar nucleon electromagnetic polarisabilities and thus access the neutron polarisabilities. The experiment will use a high-pressure gas-scintillator active target to measure recoiling He ions in...

60. Quantum Monte Carlo calculations of electromagnetic moments and transitions in A<=10 nuclei with two-body chiEFT currents

Saori pastore (University of South Carolina, Columbia)

02/07/2015, 17:35

Few-Body Physics Working Group

Talk

In this talk, I will present a number of Quantum Monte Carlo calculations of electromagnetic observables in light nuclei (A<=10) including electromagnetic moments, M1 and E2 transitions. These calculations use wave functions generated from nuclear Hamiltonians with two- and three-nucleon realistic potentials. In addition to impulse approximation terms, nuclear electromagnetic currents ...

41. Extracting neutron polarizabilities from Compton scattering on quasi-free neutron in gamma d->gamma n p

Berhan Demissie (George Washington University, Washington)

02/07/2015, 17:50

Few-Body Physics Working Group

Talk

Compton scattering processes are ideal to study electric and magnetic dipole polarizability coeffcients of nucleons [1]. These fundamental quantities parametrize the response to a monochromatic photon probe. In this work, the inelastic channel γd → γnp is treated in χEFT, with a focus on the NQFP - neutron quasi-free peak - kinematic region. In this region, the momentum of the outgoing proton...