Thu·Nov 14, 2019Thursday·November 14, 2019

1. 01*

   Baryon-Number-Violating Nucleon and Dinucleon Decays in a Model with Large Extra Dimensions

   Sudhakantha Girmohanta🇺🇸 · Robert Shrock🇺🇸

   It is known that limits on baryon-violating nucleon decays do not, in general, imply corresponding suppression of $n-\bar{n}$ transitions. In the context of a model with fermions propagating in higher dimensions, we investigate a related question, namely the implications of limits on $\Delta L=-1$ proton and bound neutron decays mediated by four-fermion operators for rates of nucleon decays mediated by $k$-fermion operators with $k=6$ and $k=8$. These include a variety of nucleon and dinucleon decays to dilepton and trilepton final states with $\Delta L=-3,-2,1$, and $2$. We carry out a low-energy effective field theory analysis of relevant operators for these decays and show that, in this extra-dimensional model, the rates for these decays are strongly suppressed and hence are in accord with experimental limits.

   hep-phPRD(2020)·33 citations
2. 02*

   Double inclusive small-x gluon production and their azimuthal correlations in a biased ensemble

   Gary Kapilevich🇺🇸

   We consider double $gg\to g$ production in the presence of a bias on the unintegrated gluon distribution of the colliding hadron or nuclei. Such bias could be due to the selection of configurations with a greater number of gluons or higher mean transverse momentum squared or, more generally, due to a modified spectral shape of the gluon distribution in the hadrons. Hence, we consider reweighted functional averages over the stochastic ensemble of small-x gluons. We evaluate explicitly the double inclusive gluon transverse momentum spectrum in high-energy collisions, and their azimuthal correlations, for a few simple examples of biases.

   hep-phnucl-thPRD(2020)·1 citation
3. 03*

   The heavy quarkonium inclusive decays using the principle of maximum conformality

   Qing Yu🇨🇳 · Xing-Gang Wu🇨🇳 · Jun Zeng🇨🇳 · Xu-Dong Huang🇨🇳 · Huai-Min Yu (Chongqing U.)🇨🇳

   The next-to-next-to-leading order (NNLO) pQCD correction to the inclusive decays of the heavy quarkonium ${\eta }_Q$ ($Q$ being $c$ or $b$) has been done in the literature within the framework of nonrelativistic QCD. One may observe that the NNLO decay width still has large conventional renormalization scale dependence due to its weaker pQCD convergence, e.g. about ${(}_{-34\%}^{+4\%})$ for ${\eta }_c$ and ${(}_{-9\%}^{+0.0})$ for ${\eta }_b$, by varying the scale within the range of $[m_Q,4m_Q]$. The principle of maximum conformality (PMC) provides a systematic way to fix the ${\alpha }_s$-running behavior of the process, which satisfies the requirements of renormalization group invariance and eliminates the conventional renormalization scheme and scale ambiguities. Using the PMC single-scale method, we show that the resultant PMC conformal series is renormalization scale independent, and the precision of the ${\eta }_Q$ inclusive decay width can be greatly improved. Taking the relativistic correction $\mathcal{O}({\alpha }_s{v}^2)$ into consideration, the ratios of the ${\eta }_Q$ decays to light hadrons or $\gamma \gamma$ are: $R_{{\eta }_c}^{\mathrm{NNLO}}{|}_{\mathrm{PMC}}=(3.93_{-0.24}^{+0.26})\times 10^3$ and $R_{{\eta }_b}^{\mathrm{NNLO}}{|}_{\mathrm{PMC}}=(22.85_{-0.87}^{+0.90})\times 10^3$, respectively. Here the errors are for $\Delta {\alpha }_s(M_Z)=\pm 0.0011$. As a step forward, by applying the Pad$\acute{e}$ approximation approach (PAA) over the PMC conformal series, we obtain approximate NNNLO predictions for those two ratios, e.g. $R_{{\eta }_c}^{\mathrm{NNNLO}}{|}_{\mathrm{PAA}+\mathrm{PMC}}=(5.66_{-0.55}^{+0.65})\times 10^3$ and $R_{{\eta }_b}^{\mathrm{NNNLO}}{|}_{\mathrm{PAA}+\mathrm{PMC}}=(26.02_{-1.17}^{+1.24})\times 10^3$. The $R_{{\eta }_c}^{\mathrm{NNNLO}}{|}_{\mathrm{PAA}+\mathrm{PMC}}$ ratio agrees with the latest PDG value $R_{{\eta }_c}^{\exp }=(5.3_{-1.4}^{+2.4})\times 10^3$, indicating the necessity of a strict calculation of NNNLO terms.

   hep-phEPJC(2020)·16 citations
4. 04*

   Braneworld Cosmological Effect on Freeze-in Dark Matter Density and Lifetime Frontier

   Victor Baules🇺🇸 · Nobuchika Okada🇺🇸 · Satomi Okada🇺🇸

   In the 5-dimensional braneworld cosmology, the Friedmann equation of our 4-dimensional universe on a brane is modified at high temperatures while the standard Big Bang cosmology is reproduced at low temperatures. Based on two well-known scenarios, the Randall-Sundrum and Gauss-Bonnet braneworld cosmologies, we investigate the braneworld cosmological effect on the relic density of a non-thermal dark matter particle whose interactions with the Standard Model particles are so weak that its relic density is determined by the freeze-in mechanism. For dark matter production processes in the early universe, we assume a simple scenario with a light vector-boson mediator for the dark matter particle to communicate with the Standard Model particles. We find that the braneworld cosmological effect can dramatically alters the resultant dark matter relic density from the one in the standard Big Bang cosmology. As an application, we consider a right-handed neutrino dark matter in the minimal $B-L$ extended Standard Model with a light $B-L$ gauge boson ($Z^{\prime }$) as a mediator. We find an impact of the braneworld cosmological effect on the search for the long-lived $Z^{\prime }$ boson at the planned/proposed Lifetime Frontier experiments.

   hep-phastro-ph.COhep-exEPJC(2022)·9 citations
5. 05*

   Relativistic effects in search for new intra-atomic force with isotope shifts

   Minoru Tanaka🇯🇵 · Yasuhiro Yamamoto🇵🇱

   Isotope shift of atomic spectra is considered as a probe of new interaction between electrons and neutrons in atoms. We employ the method of seeking a breakdown of King's linearity in the isotope shifts of two atomic transitions. In the present work, we evaluate the magnitudes of the nonlinearity using relativistic wave functions and the result is compared with that of nonrelativistic wave functions in our previous work. It turns out that the nonrelativistic calculation underestimates the nonlinearity owing to the new interaction in the mass range of the mediator greater than 1 MeV. Further, we find that the nonlinearity within the standard model of particle physics is significantly magnified by the relativistic effect in the ${\text{p}}_{1/2}$ state. To get rid of this obstacle in the new physics search, we suggest to avoid ${\text{p}}_{1/2}$, and use ${\text{p}}_{3/2}$ instead for example.

   hep-phphysics.atom-phPTEP(2020)·11 citations
6. 06*

   Composite Higgs Meets Planck Scale: Partial Compositeness from Partial Unification

   Giacomo Cacciapaglia🇫🇷 · Shahram Vatani🇫🇷 · Chen Zhang🇹🇼

   Providing an Ultra-Violet completion valid up to the Planck scale is of paramount importance to validate the composite Higgs paradigm, at par with supersymmetry. We propose the first complete and feasible framework, based on partial unification of a confining hypercolor gauge group, where couplings of the standard model fermions are mediated by both gauge and scalar bosons. We demonstrate our approach by providing an explicit model based on a Techni-Pati-Salam unification, $SU(8{)}_{\mathrm{PS}}\times SU(2{)}_L\times SU(2{)}_R$, able to generate masses for all fermion generations, including neutrinos, via partial compositeness. We predict an $Sp(4)$ hypercolor group, and lattice studies will be crucial to validate the model.

   hep-phPLB(2021)·30 citations
7. 07*

   Jet quenching and effects of non-Gaussian transverse-momentum broadening on di-jet observables

   A. van Hameren🇵🇱 · K. Kutak🇵🇱 · W. Płaczek🇵🇱 · M. Rohrmoser🇵🇱 · K. Tywoniuk🇳🇴

   We study, at a qualitative level, production of jet pairs in ultrarelativistic nuclear collisions within a framework combining High Energy Factorisation (HEF) and in-medium propagation of jet particles that takes into account stochastic transverse forces as well as medium-induced radiation. We find that the resulting di-jet observables feature the behaviour deviating from that of jet-pairs which undergo transverse-momentum broadening following the Gaussian distribution.

   hep-phPRC(2020)·7 citations
8. 08*

   Multi-component scalar dark matter from a $Z_N$ symmetry: a systematic analysis

   Carlos E. Yaguna🇨🇴 · Óscar Zapata🇨🇴

   The dark matter may consist not of one elementary particle but of different species, each of them contributing a fraction of the observed dark matter density. A major theoretical difficulty with this scenario --dubbed multi-component dark matter-- is to explain the stability of these distinct particles. Imposing a single $Z_N$ symmetry, which may be a remnant of a spontaneously broken $U(1)$ gauge symmetry, seems to be the simplest way to simultaneously stabilize several dark matter particles. In this paper we systematically study scenarios for multi-component dark matter based on various $Z_N$ symmetries ($N\le 10$) and with different sets of scalar fields charged under it. A generic feature of these scenarios is that the number of stable particles is not determined by the Lagrangian but depends on the relations among the masses of the different fields charged under the $Z_N$ symmetry. We explicitly obtain and illustrate the regions of parameter space that are consistent with up to five dark matter particles. For $N$ odd, all these particles turn out to be complex, whereas for $N$ even one of them may be real. Within this framework, many new models for multi-component dark matter can be implemented.

   hep-phJHEP(2020)·50 citations
9. 09*

   Phenomenology of GUT-inspired gauge-Higgs unification

   Christoph Englert🇬🇧 · David J. Miller🇬🇧 · Dumitru Dan Smaranda🇬🇧

   We perform a detailed investigation of a Grand Unified Theory (GUT)-inspired theory of gauge-Higgs unification. Scanning the model's parameter space with adapted numerical techniques, we contrast the scenario's low energy limit with existing SM and collider search constraints. We discuss potential modifications of di-Higgs phenomenology at hadron colliders as sensitive probes of the gauge-like character of the Higgs self-interactions and find that for phenomenologically viable parameter choices modifications of the order of 20\% compared to the SM cross section can be expected. While these modifications are challenging to observe at the LHC, a future 100 TeV hadron collider might be able to constrain the scenario through more precise di-Higgs measurements. We point out alternative signatures that can be employed to constrain this model in the near future.

   hep-phhep-exPLB(2020)·21 citations
10. 10*

    Probing Lepton Flavor Violating decays in MSSM with Non-Holomorphic Soft Terms

    Utpal Chattopadhyay🇮🇳 · Debottam Das🇮🇳 · Samadrita Mukherjee🇮🇳

    The Minimal Supersymmetric Standard Model (MSSM) can be extended to include non-holomorphic trilinear soft supersymmetry (SUSY) breaking interactions that may have distinct signatures. We consider non-vanishing off-diagonal entries of the coupling matrices associated with holomorphic (of MSSM) and non-holomorphic trilinear terms corresponding to sleptons with elements $A_{ij}^l$ and $A_{ij}^{\prime l}$. We first improve the MSSM charge breaking minima condition of the vacuum to include the off-diagonal entries $A_{ij}^l$ (with $i\ne j$). We further extend this analysis for non-holomorphic trilinear interactions. No other sources of lepton flavor violation like that from charged slepton matrices are considered. We constrain the interaction terms via the experimental limits of processes like charged leptons decaying with lepton flavor violation (LFV) and Higgs boson decaying to charged leptons with LFV. Apart from the leptonic decays we compute all the three neutral LFV Higgs boson decays of MSSM. We find that an analysis with non-vanishing $A_{e\mu }^{\prime }$ involving the first two generations of sleptons receives the dominant constraint from $\mu \to e\gamma$. On the other hand, $A_{e\tau }^{\prime }$ or $A_{\mu \tau }^{\prime }$ can be constrained from the CMS 13 TeV analysis giving limits to the respective Yukawa couplings via considering SM Higgs boson decaying into $e\tau$ or $\mu \tau$ final states. Contributions from $A_{ij}^l$ is too little to have any significance compared to the large effect from $A_{ij}^{\prime l}$.

    hep-phJHEP(2020)·19 citations
11. 11*

    Complementarity of the future $e^{+}{e}^{-}$ colliders and gravitational waves in the probe of complex singlet extension to the Standard Model

    Ning Chen🇨🇳 · Tong Li🇨🇳 · Yongcheng Wu🇨🇦 · Ligong Bian🇨🇳

    In this work, we study the future probes of the complex singlet extension to the Standard Model (cxSM). This model is possible to realize a strongly first-order electroweak phase transition (SFOEWPT). The cxSM naturally provides dark matter (DM) candidate, with or without an exact ${\mathbb{Z}}_2$ symmetry in the scalar sector. The benchmark models which can realize the SFOEWPT are selected, and passed to the current observational constraints to the DM candidates, including the relic densities and the direct detection limits set by the latest XENON1T results. We then calculate the one-loop corrections to the SM-like Higgs boson decays and the precision electroweak parameters due to the cxSM scalar sector. We perform a global fit to the benchmark models and study the extent to which they can be probed by the future high-energy $e^{+}{e}^{-}$ colliders, such as CEPC and FCC-ee. Besides, the gravitational wave (GW) signals generated by the benchmark models are also evaluated. We further find that the future GW detector, such as LISA, is complementary in probing the benchmark models that are beyond the sensitivity of the future precision tests at the $e^{+}{e}^{-}$ colliders.

    hep-phgr-qchep-exPRD(2020)·42 citations
12. 12*

    Some remarks on axion dark matter, dark energy and energy of the quantum vacuum

    V. M. Mostepanenko🇷🇺

    In connection with the problem of dark matter, we discuss recent results on constraining the parameters of axion-to-nucleon interaction following from the experiment on measuring the difference of Casimir forces. It is shown that this experiment not only leads to competitive constraints, but provides stronger support to other constraints obtained in Casimir physics so far. The description of dark energy by means of cosmological constant originated from the quantum vacuum is considered in terms of the renormalization procedures in quantum field theory. It is argued that only the renormalized value of cosmological constant directly connected with the observed density of dark energy is of physical significance, so that some statements in the literature concerning the vacuum catastrophe may be considered as an exaggeration.

    hep-phInt.J.Mod.Phys.A(2020)·1 citation
13. 13*

    Update on splitting of lifetimes of $c$ and $b$ hyperons within the heavy quark expansion and decays ${\Xi }_Q\to {\Lambda }_Q\pi$

    M.B. Voloshin🇺🇸

    It is argued that the results of recent precision measurements by LHCb of the lifetimes of charmed and bottom hyperons are very well consistent with the description within heavy quark expansion and allow to accurately determine matrix elements of light-flavor nonsinglet four-quark operators over the hyperons and to accurately reproduce the difference of lifemes of ${\Lambda }_b$ and ${\Xi }_b^{-}$. When combined with the recent LHCb results on the decay ${\Xi }_b^{-}\to {\Lambda }_b{\pi }^{-}$ this leads to prediction of a lower bound on the rate of the decays ${\Xi }_c\to {\Lambda }_c\pi$.

    hep-phPRD(2019)·12 citations
14. 14*

    Dynamical axion misalignment with small instantons

    Manuel A. Buen-Abad🇺🇸 · JiJi Fan🇺🇸

    We present a new mechanism to relax the initial misalignment angle of the QCD axion and raise the cosmological bound on the axion decay constant. The QCD axion receives a contribution from small UV instantons during inflation, which raises its mass to the inflationary Hubble scale. This makes the axion start rolling down its potential early on. In the scenario, the standard model Yukawa couplings of quarks are dynamical, being of order one during the inflationary era and reducing to their standard model values once it ends. This means that after inflation the contribution of the small instantons is suppressed, and the axion potential reduces to the standard one from the usual IR instantons. As a result, when the axion starts to oscillate again after inflation, the initial misalignment angle is suppressed due to the dynamics during inflation. While the general idea of dynamical axion misalignment has been discussed in the literature before, we present in detail the major bottleneck on the mismatching between the minima of the axion potentials during and after inflation, and how it is circumvented in our scenario via the Froggatt-Nielsen mechanism. Taking into account of all the constraints, we find that the axion decay constant could be raised to the GUT scale, $10^{15}$ GeV, in our scenario.

    hep-phJHEP(2019)·27 citations
15. 15*

    Axion Dark Matter, Proton Decay and Unification

    Pavel Fileviez Perez🇺🇸 · Clara Murgui🇪🇸 · Alexis D. Plascencia🇺🇸

    We discuss the possibility to predict the QCD axion mass in the context of grand unified theories. We investigate the implementation of the DFSZ mechanism in the context of renormalizable SU(5) theories. In the simplest theory, the axion mass can be predicted with good precision in the range $m_a=(2-16)$ neV, and there is a strong correlation between the predictions for the axion mass and proton decay rates. In this context, we predict an upper bound for the proton decay channels with antineutrinos, $\tau (p\to K^{+}\bar{\nu })\lesssim 4\times 10^{37}\text{ yr}$ and $\tau (p\to {\pi }^{+}\bar{\nu })\lesssim 2\times 10^{36}\text{ yr}$. This theory can be considered as the minimal realistic grand unified theory with the DFSZ mechanism and it can be fully tested by proton decay and axion experiments.

    hep-phhep-exJHEP(2020)·36 citations
16. 16*

    The Polarized Three-Loop Anomalous Dimensions from a Massive Calculation

    Arnd Behring🇩🇪 · Johannes Blümlein🇩🇪 · Abilio De Freitas🇩🇪 · Alexander Goedicke🇩🇪 · Sebastian Klein🇺🇸 · Andreas van Manteuffel🇺🇸 · Carsten Schneider🇦🇹 · Kay Schönwald🇩🇪

    We present results on the calculation of the polarized 2- and 3-loop anomalous dimensions in a massive computation of the associated operator matrix element. We also discuss the treatment of ${\gamma }_5$ and derive results in the M-scheme.10

    hep-phPoS(2019)·0 citations
17. 17*

    Electric dipole moment of the neutron in Two Higgs Doublet Models with flavor changing

    Jan O. Eeg🇳🇴

    I consider contributions to the neutron electric dipole moment within Two Higgs Doublet Models which allow for small flavor changing neutral Higgs couplings. In a previous paper, I considered flavor changing interactions for the Standard Model Higgs boson to first order in the flavor changing coupling. In that paper I found that the obtained value of the neutron electric dipole moment were below the present experimental limit, given previous restrictions on such couplings. Because this was an effective theory, the result depended on an ultraviolet cut off $\Lambda$, parametrized as $ln({\Lambda }^2)$. In the present paper I demonstrate that, when going to Two Higgs Doublet Models, the result stays the same as in the previous paper, up to $M_{SM}^2/M_H^2$ corrections, where $M_{SM}$ is the mass of the top-quark or the $W$-boson. $M_H$ is the mass of the heavy neutral scalar Higgs-boson $H$ which is much heavier than the light neutral Higgs boson $h$ with mass $M_h$. In the limit $M_H^2\gg M_h^2$, the $ln({\Lambda }^2)$ behaviour in the previous paper is replaced by $ln({\widetilde{M_H}}^2)$, where $\widetilde{M_H}$ is of order $M_H$. I also explain how some divergences due to exchange of the pseudoscalar Higgs $A$ are cancelled by similar contributions from the scalar heavy Higgs $H$, and that these contributions, and finite contributions from $A$-exchange, are suppressed.

    hep-phPRD(2020)·4 citations
18. 18*

    Elastic electromagnetic form factors of vector mesons

    Yin-Zhen Xu🇨🇳 · Daniele Binosi🇮🇹 · Zhu-Fang Cui🇨🇳 · Bo-Lin Li🇨🇳 · Craig D Roberts🇨🇳 · Shu-Sheng Xu🇨🇳 · Hong-Shi Zong🇨🇳

    A symmetry-preserving approach to the two valence-body continuum bound-state problem is used to calculate the elastic electromagnetic form factors of the $\rho$-meson and subsequently to study the evolution of vector-meson form factors with current-quark mass. To facilitate a range of additional comparisons, $K^{\ast }$ form factors are also computed. The analysis reveals that: vector mesons are larger than pseudoscalar mesons; composite vector mesons are non-spherical, with magnetic and quadrupole moments that deviate $\sim 30$\% from point-particle values; in many ways, vector-meson properties are as much influenced by emergent mass as those of pseudoscalars; and vector meson electric form factors possess a zero at spacelike momentum transfer. Qualitative similarities between the electric form factors of the $\rho$ and the proton, $G_E^p$, are used to argue that the character of emergent mass in the Standard Model can force a zero in $G_E^p$. Morover, the existence of a zero in vector meson electric form factors entails that a single-pole vector meson dominance model can only be of limited use in estimating properties of off-shell vector mesons, providing poor guidance for systems in which the Higgs-mechanism of mass generation is dominant.

    ↳ nucl-thhep-exhep-lathep-ph+1PRD(2019)·63 citations
19. 19*

    Parameterized and inspiral-merger-ringdown consistency tests of gravity with multi-band gravitational wave observations

    Zack Carson🇺🇸 · Kent Yagi🇺🇸

    The gravitational wave observations of colliding black holes have opened a new window into the unexplored extreme gravity sector of physics, where the gravitational fields are immensely strong, non-linear, and dynamical. 10 binary black hole merger events observed so far can be used to test Einstein's theory of general relativity, which has otherwise been proven to agree with observations from several sources in the weak- or static-field regimes. One interesting future possibility is to detect gravitational waves from GW150914-like stellar-mass black hole binaries with both ground-based and space-based detectors. We here demonstrate the power of testing extreme gravity with such multi-band gravitational-wave observations. In particular, we consider two theory-agnostic methods to test gravity using gravitational waves. The first test is the parameterized test where we introduce generic non-Einsteinian corrections to the waveform, which can easily be mapped to parameters in known example theories beyond general relativity. The second test is the inspiral-merger-ringdown consistency test where one derives the mass and spin of a merger remnant from the inspiral and merger-ringdown independently assuming general relativity is correct, and then check their consistency. In both cases, we use Fisher analyses and compare the results with Bayesian ones wherever possible. Regarding the first test, we find that multi-band observations can be crucial in probing certain modified theories of gravity, including those with gravitational parity violation. Regarding the second test, we show that future single-band detections can improve upon the current tests by roughly three orders of magnitude, and further 7-10 times improvement may be realized with multi-band observations.

    ↳ gr-qchep-phPRD(2020)·82 citations
20. 20*

    Developments in the position-space approach to the HLbL contribution to the muon $g-2$ on the lattice

    Nils Asmussen🇬🇧 · En-Hung Chao🇩🇪 · Antoine Gérardin🇩🇪 · Jeremy R. Green🇨🇭 · Renwick J. Hudspith🇩🇪 · Harvey B. Meyer🇩🇪 · Andreas Nyffeler🇩🇪

    The measurement of the anomalous magnetic moment of the muon and its prediction allow for a high-precision test of the Standard Model (SM). In this proceedings article we present ongoing work combining lattice QCD and continuum QED in order to determine an important SM contribution to the magnetic moment, the hadronic light-by-light contribution. We compute the quark-connected contribution in the Mainz position-space approach and investigate the long-distance part of our data using calculations of the ${\pi }^0$-pole and charged pion loop contributions.

    ↳ hep-lathep-phPoS(2019)·21 citations
21. 21*

    Lambda-nucleon scattering in baryon chiral perturbation theory

    X.-L. Ren🇩🇪 · E. Epelbaum🇩🇪 · J. Gegelia🇩🇪

    We calculate the lambda-nucleon scattering phase shifts and mixing angles by applying time-ordered perturbation theory to the manifestly Lorentz-invariant formulation of SU(3) baryon chiral perturbation theory. Scattering amplitudes are obtained by solving the corresponding coupled-channel integral equations that have a milder ultraviolet behavior compared to their non-relativistic analogs. This allows us to consider the removed cutoff limit in our leading-order calculations also in the ${}^3{P}_0$ and ${}^3{P}_1$ partial waves. We find that, in the framework we are using, at least some part of the higher-order contributions to the baryon-baryon potential in these channels needs to be treated nonperturbatively and demonstrate how this can be achieved in a way consistent with quantum field theoretical renormalization for the leading contact interactions. We compare our results with the ones of the non-relativistic approach and lattice QCD phase shifts obtained for non-physical pion masses.

    ↳ nucl-thhep-lathep-phPRC(2020)·28 citations
22. 22*

    Generalization of Bantilan-Ishi-Romatschke flow to Magnetohydrodynamics

    M. Shokri🇮🇷

    We present a generalization of the Bantilan-Ishi-Romatschke (BIR) solution of relativistic hydrodynamics to relativistic magnetohydrodynamics (RMHD). Using the symmetries of the boundary of the Kerr-AdS5 black hole, and certain simplifying assumptions we solve the equations of RMHD on this boundary for a highly conductive fluid. We then transform the resulting solution to the flat spacetime. Furthermore, we show that the force-free condition causes the magnetic field to become singular at particular points and propose a regularization process for removing the singularities. The regularization process reveals the importance of non-vanishing electrical current in RMHD.

    ↳ hep-thgr-qchep-phnucl-th+1JHEP(2020)·8 citations

* Reconstructed cohort: no mailing for this day survives in the archive. Papers are grouped by their submission times and arXiv's announcement cut-off, assuming announcement without delay; positions follow identifier order. Validated at ~91% exact-day agreement against the archived era.