The nuclear physics of muon capture

Measday, D.F.

doi:10.1016/s0370-1573(01)00012-6

Cited by 244 publications

(300 citation statements)

References 347 publications

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“…[1,2] for a review). These processes provide a testing ground for wave functions and, indirectly, the interactions from which these are obtained, and for models of the nuclear weak current.…”

Section: Introductionmentioning

confidence: 99%

Muon capture on deuteron andHe3

et al. 2011

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The muon capture reactions 2 H(µ − , νµ)nn and 3 He(µ − , νµ) 3 H are studied with conventional or chiral realistic potentials and consistent weak currents. The initial and final A = 2 and 3 nuclear wave functions are obtained from the Argonne v18 or chiral N3LO two-nucleon potential, in combination with, respectively, the Urbana IX or chiral N2LO three-nucleon potential in the case of A = 3. The weak current consists of polar-and axial-vector components. The former are related to the isovector piece of the electromagnetic current via the conserved-vector-current hypothesis. These and the axial currents are derived either in a meson-exchange or in a chiral effective field theory (χEFT) framework. There is one parameter (either the N -to-∆ axial coupling constant in the meson-exchange model, or the strength of a contact term in the χEFT model) which is fixed by reproducing the Gamow-Teller matrix element in tritium β-decay. The model dependence relative to the adopted interactions and currents (and cutoff sensitivity in the χEFT currents) is weak, resulting in total rates of 392.0 ± 2.3 s −1 for A = 2, and 1484 ± 13 s −1 for A = 3, where the spread accounts for this model dependence.

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Section: Introductionmentioning

confidence: 99%

Muon capture on deuteron andHe3

et al. 2011

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“…10 13 10 14 10 16 10 18 92 keV (5 → 4) 72% 68% 67% 67% 50 keV (6 → 5) 91% 84% 82% 81% 30 keV (7 → 6) 83% 71% 69% 68% Additionally, our cascade model was compared with the data for muonic exotic atoms, which are widely measured in experiments [26]. The nuclear absorptions are not seen in the muonic exotic atoms (except for high Z targets) and therefore, there is only one parameter, a, to control the X-ray yields at low n states.…”

Section: Parameter Study and Comparison With Experimental Datamentioning

confidence: 99%

“…The nuclear absorptions are not seen in the muonic exotic atoms (except for high Z targets) and therefore, there is only one parameter, a, to control the X-ray yields at low n states. Table 4 shows the comparison with the experimental data and a cascade model developed by Vogel and Hartmann for the muonic exotic atoms [26,27,28]. The parameters used here were W = 0 MeV (no nuclear absorption), Γ re f = 10 15 s −1 , and a = 0.16, -0.18, -0.01 for Al, Fe and Au targets, obtained by the empirical fit.…”

Section: Parameter Study and Comparison With Experimental Datamentioning

confidence: 99%

A measurement of atomic X-ray yields in exotic atoms and implications for an antideuteron-based dark matter search

Aramaki

Chan

Craig

et al. 2013

Astroparticle Physics

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The General AntiParticle Spectrometer (GAPS) is a novel approach for the indirect dark matter search that exploits cosmic antideuterons. GAPS utilizes a distinctive detection method using atomic X-rays and charged particles from the exotic atom as well as the timing, stopping range and dE/dX energy deposit of the incoming particle, which provides excellent antideuteron identification. In anticipation of a future balloon experiment, an accelerator test was conducted in 2004 and 2005 at KEK, Japan, in order to prove the concept and to precisely measure the X-ray yields of antiprotonic exotic atoms formed with different target materials [1]. The X-ray yields of the exotic atoms with Al and S targets were obtained as ∼ 75%, which are higher than were previously assumed in [2]. A simple, but comprehensive cascade model has been developed not only to evaluate the measurement results but also to predict the X-ray yields of the exotic atoms formed with any materials in the GAPS instrument. The cascade model is extendable to any kind of exotic atom (any negatively charged cascading particles with any target materials), and it was compared and validated with other experimental data and cascade models for muonic and antiprotonic exotic atoms. The X-ray yields of the antideuteronic exotic atoms are predicted with a simple cascade model and the sensitivity for the GAPS antideuteron search was estimated for the proposed long duration balloon program [3], which suggests that GAPS has a strong potential to detect antideuterons as a dark matter signature. A GAPS prototype flight (pGAPS) was launched successfully from the JAXA/ISAS balloon facility in Hokkaido, Japan in summer 2012 [4,5] and a proposed GAPS science flight is to fly from Antarctica in the austral summer of 2017-2018.

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“…The non-Bonn potentials generally underbind the trinucleon by about 0.5 to 1 MeV. Congleton and Truhlik [9] pointed out that 4 [1] 0 ∼ 1 − const r 2 s 2 and that r 2 scales like the inverse of binding energy, and thus argued that one can expect a lower value for [1] 0 when a wave function with a lower binding energy is used 5 . For [ σ] 0,1 , they further argued that since it is a reduced matrix element for one-body currents (this IA calculation contains only one-body currents), the Bonn potential's weak tensor force makes this matrix element large in magnitude.…”

Section: B Importance Of Various Ingredientsmentioning

confidence: 99%

“…Since it is more sensitive to the nucleon pseudoscalar form factor g P than its non-radiative counterpart (Refs. [3,4] are two reviews on ordinary muon capture), it is an ideal candidate for checking the value of this form factor which is theoretically predicted by PCAC (Partial Conservation of Axial Current). With the experiment on-going, it is necessary to have a modern theoretical calculation of the process to interpret the anticipated experimental results.…”

Section: Introductionmentioning

confidence: 99%

Radiative muon capture by3He

Ho¹,

Fearing²,

Schadow³

2002

Phys. Rev. C

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The rate of the nuclear reaction 3 He + µ − → 3 H + γ + νµ has been calculated using both the elementary particle model (EPM) approach and the impulse approximation (IA) approach. Using the EPM approach, the exclusive statistical radiative muon capture (RMC) rate for photon energy greater than 57 MeV is found to be 0.245 s −1 and the ordinary muon capture (OMC) rate to be 1503 s −1 . The IA calculation exhibits a slight dependence on the type of trinucleon wave functions used. The difference between the IA and EPM calculation is larger for RMC than for OMC. To resolve the difference between the two approaches a more detailed investigation including meson exchange corrections will be required.23. 40.-s, 21.45.+v, 13.10.+q, 24.80.+y

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The nuclear physics of muon capture

Cited by 244 publications

References 347 publications

Muon capture on deuteron andHe3

Muon capture on deuteron andHe3

A measurement of atomic X-ray yields in exotic atoms and implications for an antideuteron-based dark matter search

Radiative muon capture by3He

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