Three-phase description of strongly interacting matter

Suhonen, E.; Sohlo, Sauli

doi:10.1088/0305-4616/13/12/007

Cited by 40 publications

(29 citation statements)

References 13 publications

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“…A comparison between the space factors based on the new Q-value and the Q-value from AME2003 and their uncertainties is shown in table II. Using the single-state-dominance hypothesis (SSDH) [8][9][10], which works well for the nearby nuclei 100Mo and 116Cd, the SSDH-half-life was calculated to be T 2ν 1/2 = 1.5 (6) × 10 20 yr, which is in good agreement with previously predicted values [8,9,27]. The uncertainty of the half-life was evaluated considering the uncertainties of the β-decay half-life and the minimal and maximal value of the β-decay and electron-capture amplitudes of the 1+ intermediate state 110 Ag.…”

Section: νsupporting

confidence: 84%

QValue and Half-Lives for the Double-β-Decay NuclidePd110

et al. 2012

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The 110 Pd double-beta decay Q-value was measured with the Penning-trap mass spectrometer ISOLTRAP to be Q = 2017.85 (64) keV. This value shifted by 14 keV compared to the literature value and is 17 times more precise, resulting in new phase-space factors for the two-neutrino and neutrinoless decay modes. In addition a new set of the relevant matrix elements has been calculated. The expected half-life of the two-neutrino mode was reevaluated as 1. The recent results on neutrino oscillations [1-4] have revolutionized our understanding of the role played by neutrinos in particle physics and cosmology, in particular by proving that neutrinos have a finite mass. In the quest for a detailed understanding of the neutrino itself, the rare process of double-beta decay offers the most promising opportunity to probe the neutrino character and to constrain the neutrino mass [5,6]. In contrast to neutrino oscillations, which violate the individual flavor-lepton number while conserving the total lepton number, the process of neutrinoless double-beta decay (0νββ-decay) violates total lepton number and is as such, forbidden by the Standard Model of particle physics. Moreover, unlike the observed neutrino-accompanied double-beta decay (2νββ-decay) process, the 0νββ-decay process would imply that the neutrino is a Majorana particle, i.e., its own antiparticle. While the decay spectrum of the 2νββ-decay is continuous, the experimental signal of the 0νββ-decay represents the sum energy of the two electrons at the decay Q-value. The expected half-life of the 0νββ-decay is extremely long and hence, very small event rates are expected. In addition, a high accuracy (below 1 keV) is desirable to properly identify the signal with respect to background. Furthermore, a well-known Q-value allows a precise determination of the phase space of the halflives of the double-beta decay modes. The decay rates of both decay modes are strong functions of the Q-value. 0νββ-decay scales with the fifth power of the Q-value and 2νββ-decay with the eleventh power. Eleven nuclides (

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Section: νsupporting

confidence: 84%

QValue and Half-Lives for the Double-β-Decay NuclidePd110

et al. 2012

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“…2 for double-beta chains involving medium-mass nuclei. As seen from the figure the available data on relevant beta decays are rather scarse and more beta-decay measurements are called for [51]. Particularly, in case of a possible single-state dominance [39], beta decays are a powerful tool to experimentally determine the 2v/3/3-decay rate [52,53].…”

Section: Beta Decays As Probes Of Virtual Transitionsmentioning

confidence: 99%

“…3 the relevant multipole contributions J^ = I+,2+,3+,4+ to the Gamow-Teller part A/QJ' of the matrix element M^^) of (I) (see, e.g. [51]) are contrasted against strong muon-capture transitions ' *^Ti -^ '*^Sc(J'^). From the figure one can conclude that the OMC feeds mainly those intermediate states which are relevant building blocks ofAr^j.…”

Section: Nuclear Muon Capture As a Probe Of Virtual Transitionsmentioning

confidence: 99%

Nuclear Matrix Elements for 0νββ Decay: Recent Advances

Suhonen¹,

Kortelainen²

2008

AIP Conference Proceedings

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The neutrinoless double beta (Ovjiji) decay of atomic nuclei plays a key role in the search for massive Majorana neutrinos and their mass scale. To extract the necessary information from the measured data the nuclear-structure effects have to be accounted for The nuclear matrix elements (NME's) for the Ovjiji decays crystallize these effects, and the calculation of these matrix elements has become of paramount importance in the community of neutrino physics. In this article we discuss the NME's for the light-neutrino exchange mechanism, computed by using the protonneutron quasiparticle random-phase approximation (pnQRPA). Recent developments in this field relate to the handling of the nucleon-nucleon short-range correlations in the NME's and independent experimental probes of the wave functions relevant for the NME's.

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“…In the past, the MCM was used in studies of the 2νββ-decay rates to excited 0 + and 2 + states in several publications 20,21,22,23,24,25,26,27,28,29,30 as also in studies of 0νββ-decay rates to excited 0 + states in Refs. 30,31,32,33,34 . In the MCM the 2 + 1 state of the even-even nucleus, corresponding to the Q † (2 + 1 ) phonon operator of (4), is generated by the quasiparticle random-phase approximation (QRPA) described in detail in Ref.…”

Section: Introductionmentioning

confidence: 99%

NUCLEAR-STRUCTURE EFFECTS ON DOUBLE BETA DECAYS TO 0⁺ STATES IN ⁷⁶Ge

Suhonen

2011

Int. J. Mod. Phys. E

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Neutrinoless double beta (0νββ) decay of 76 Ge to the ground state and first excited 0 + state in 76 Se is discussed in terms of the associated nuclear matrix elements. The effects arizing from the size of the single-particle model space and the occupancies of the individual orbits are discussed in the framework of the (higher) quasiparticle randomphase approximation with effective, G-matrix-derived nuclear forces. It is found that the orbital occupancies play a role for the size of the nuclear matrix element. Contrary to the ground-state transition the transition to the first excited 0 + state does not depend sensitively on the size of the model space.

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Three-phase description of strongly interacting matter

Cited by 40 publications

References 13 publications

QValue and Half-Lives for the Double-β-Decay NuclidePd110

QValue and Half-Lives for the Double-β-Decay NuclidePd110

Nuclear Matrix Elements for 0νββ Decay: Recent Advances

NUCLEAR-STRUCTURE EFFECTS ON DOUBLE BETA DECAYS TO 0⁺ STATES IN ⁷⁶Ge

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Three-phase description of strongly interacting matter

Cited by 40 publications

References 13 publications

QValue and Half-Lives for the Double-β-Decay NuclidePd110

QValue and Half-Lives for the Double-β-Decay NuclidePd110

Nuclear Matrix Elements for 0νββ Decay: Recent Advances

NUCLEAR-STRUCTURE EFFECTS ON DOUBLE BETA DECAYS TO 0+ STATES IN 76Ge

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NUCLEAR-STRUCTURE EFFECTS ON DOUBLE BETA DECAYS TO 0⁺ STATES IN ⁷⁶Ge