Pion-less Effective Field Theory on Low-Energy Deuteron Electro-Disintegration
| dc.creator | Christlmeier, Stefan | |
| dc.creator | Griesshammer, Harald W. | |
| dc.date | 2008-03-09 | |
| dc.date | 2008-05-21 | |
| dc.date.accessioned | 2026-07-07T11:33:05Z | |
| dc.date.available | 2026-07-07T11:33:05Z | |
| dc.description | In view of its relation to Big-Bang Nucleo-Synthesis and a reported discrepancy between nuclear models and data taken at S-DALINAC, electro-induced deuteron break-up 2H(e,e' p)n is studied at momentum transfer q<100MeV and close to threshold in the low-energy nuclear Effective Field Theory without dynamical pions. The result at N2LO for electric dipole currents and at NLO for magnetic ones converges order-by-order better than quantitatively predicted and contains no free parameter. It is at this order determined by simple, well-known observables. Decomposing the doubly differential cross-section into the longitudinal-plus-transverse (L+T), transverse-transverse (TT) and longitudinal-transverse interference (LT) terms, we find excellent agreement with a potential-model calculation by Arenh"ovel et al using the Bonn potential. Theory and data also agree well on σ_{L+T}. There is however no space on the theory-side for the discrepancy of up to 30%, 3-σbetween theory and experiment in σ_{LT}. From universality, we conclude that no theoretical approach with the correct deuteron asymptotic wave-function can explain the data. Un-determined short-distance contributions that could affect σ_{LT} enter only at high orders, i.e. at the few-percent level. We notice some issues with the kinematics and normalisation of the data reported. | |
| dc.description | 30 pages LaTeX2e, including 10 figures as 34 .eps files embedded with includegraphicx. Increased figure sizes; contents identical to version approved for publication in Phys Rev C -- spelling and grammatical differences | |
| dc.identifier | https://arxiv.org/abs/0803.1307 | |
| dc.identifier | http://arxiv.org/abs/0803.1307 | |
| dc.identifier | Phys.Rev.C77:064001,2008 | |
| dc.identifier | doi:10.1103/PhysRevC.77.064001 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/197772 | |
| dc.subject | Nuclear Theory | |
| dc.title | Pion-less Effective Field Theory on Low-Energy Deuteron Electro-Disintegration | |
| dc.type | text |