Carroll 
<i>et al.</i>
 Reply:

Carroll, Mark Anthony; D’Alessandro, Giampaolo; Lippi, G. L.; Oppo, Gian-Luca; Papoff, F.

doi:10.1103/physrevlett.128.029402

Cited by 19 publications

(21 citation statements)

References 7 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…We studied two example subsets of the SME using the Dirac-Hamiltonian analysis in Section IV. The results of one of these cases, the Hamilton's equations in (37)(38)(39)(40)(41)(42), were studied for FLRW cosmological solutions in Section V, where some novel cosmological evolution was found. Further analysis for other strong-field gravity solutions can be the subject of future work, for instance black hole spacetimes or other exotic solutions [64].…”

Section: Discussionmentioning

confidence: 99%

“…Much work in the literature has involved the study of such models, particularly in the gravity con-text [30][31][32][33][34][35][36]. The connection between the coefficients for Lorentz violation in the SME and proposed models in the literature has been established for some quantum gravity approaches [38,39], massive gravity models [37], noncommutative geometry [40] as well as vector and tensor models of spontaneous Lorentz symmetry breaking. In this paper, we use our results to match to yet another model which involved explicit Lorentz breaking.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

3+1 Formulation of the Standard-Model Extension Gravity Sector

O'Neal-Ault,

Bailey,

Nilsson

2020

Preprint

View full text Add to dashboard Cite

We present a 3+1 formulation of the effective field theory framework called the Standard-Model Extension in the gravitational sector. The explicit local Lorentz and diffeomorphism symmetry breaking assumption is adopted and we perform a Dirac-Hamiltonian analysis. We show that the structure of the dynamics presents significant differences from General Relativity and other modified gravity models. We explore Hamilton's equations for some special choices of the coefficients. Our main application is cosmology and we present the modified Friedmann equations for this case. The results show some intriguing modifications to standard cosmology. In addition, we compare our results to existing frameworks and models and we comment on the potential impact to other areas of gravitational theory and phenomenology.

show abstract

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

3+1 Formulation of the Standard-Model Extension Gravity Sector

O'Neal-Ault,

Bailey,

Nilsson

2020

Preprint

View full text Add to dashboard Cite

show abstract

“…(10). A strong reduction can also be expected for the decays from non-collective high-spin isomeric states [19].…”

mentioning

confidence: 93%

The single-particle unit for alpha decay

Qi,

Liotta,

Wyss

2020

Preprint

View full text Add to dashboard Cite

A salient feature of quantum mechanics is the inherent property of collective quantum motion, when apparent independent quasiparticles move in highly correlated trajectories, resulting in strongly enhanced transition probabilities. To assess the extend of a collective quantity requires an appropriate definition of the uncorrelated average motion, often expressed by single particle units. A well known example in nuclear physics is the Weisskopf unit for electromagnetic transitions which reveals different aspects of collective motion. In this paper we define the corresponding single particle unit for alpha decay following Weisskopf's derivations. We evaluate the alpha decay amplitude as induced by four uncorrelated/non-interacting protons and neutrons and compare it with the one extracted from observed decay rates. Our definition elucidates the collectivity in alpha decay and facilitates an unified description of all alpha decay processes along the nuclear chart. Our formalism is also applicable to other particle decay processes.

show abstract

“…Particle production at energies below the threshold for its creation in nucleon-nucleon collisions can be probe to study the high-density hadronic matter properties, i.e., the chiral symmetry restoration, phase-transition from quark-gluon plasma to hadrons, hadron-nucleon interaction, nuclear equation of state etc [6][7][8][9][10]. A number of experiments for the subthreshold production of pions, kaons, antikaons and antiprotons in heavy-ion collisions were performed and precise spectra have been measured [11][12][13]. The in-medium properties associated with the secondary reactions, propagation and quasiparticle concept in matter were investigated thoroughly.…”

Section: Introductionmentioning

confidence: 99%

Antiproton production in heavy-ion collisions at subthreshold energies *

Zhu¹

2020

Chinese Phys. C

View full text Add to dashboard Cite

Within the framework of the Lanzhou quantum molecular dynamics model, the deep subthreshold antiproton production in heavy-ion collisions has been investigated thoroughly. The elastic scattering, annihilation and charge exchange reactions associated with antiproton channels are implemented in the model. The attractive antiproton potential extracted from the G-parity transformation of the nucleon selfenergies enhance the antiproton yields to some extent. The calculated invariant spectra are consistent with the available experimental data. The primordial antiproton yields increase with the mass number of colliding system. However, the annihilation reactions reduce the antiproton production and enable independent to colliding partners. Antiflow phenomena of antiprotons correlated to the mean-field potential and annihilation mechanism is found in comparison with proton flows.PACS number(s): 25.75. Dw, 25.43.+t, 25.75.Ld

show abstract

Carroll et al. Reply:

Cited by 19 publications

References 7 publications

3+1 Formulation of the Standard-Model Extension Gravity Sector

3+1 Formulation of the Standard-Model Extension Gravity Sector

The single-particle unit for alpha decay

Antiproton production in heavy-ion collisions at subthreshold energies *

Contact Info

Product

Resources

About