0384864 - ÚJF 2013 RIV NL eng J - Článek v odborném periodiku
Adam, Jiří - Tater, Miloš - Truhlík, Emil - Epelbaum, E. - Machleidt, R. - Ricci, P.
Calculation of doublet capture rate for muon capture in deuterium within chiral effective field theory.
Physics Letters. B. Roč. 709, 1-2 (2012), s. 93-100. ISSN 0370-2693. E-ISSN 1873-2445
Grant CEP: GA MŠMT LC06002; GA ČR GAP203/11/0701
Institucionální podpora: RVO:61389005
Klíčová slova: negative muon capture * deuteron * effective field theory * meson exchange currents
Kód oboru RIV: BE - Teoretická fyzika
Impakt faktor: 4.569, rok: 2012

The doublet capture rate Lambda(1/2) of the negative muon capture in deuterium is calculated employing the nuclear wave functions generated from accurate nucleon-nucleon (NN) potentials constructed at next-to-next-to-next-to-leading order of heavy-baryon chiral perturbation theory and the weak meson exchange current operator derived within the same formalism. All but one of the low-energy constants that enter the calculation were fixed from pion-nucleon and nucleon-nucleon scattering data. The low-energy constant (d) over cap (R) (c(D)). which cannot be determined from the purely two-nucleon data, was extracted recently from the triton beta-decay and the binding energies of the three-nucleon systems. The calculated values of Lambda(1/2) show a rather large spread for the used values of the (d) over cap (R). Precise measurement of Lambda(1/2) in the future will not only help to constrain the value of (d) over cap (R), but also provide a highly nontrivial test of the nuclear chiral EFT framework. Besides, the precise knowledge of the constant (d) over cap (R) will allow for consistent calculations of other two-nucleon weak processes, such as proton-proton fusion and solar neutrino scattering on deuterons, which are important for astrophysics.
Trvalý link: http://hdl.handle.net/11104/0214350