Fri·Apr 14, 2017Friday·April 14, 2017

1. 01*

   Feynman Rules for the Standard Model Effective Field Theory in $R_{\xi }$-gauges

   A. Dedes🇬🇷 · W. Materkowska🇵🇱 · M. Paraskevas🇬🇷 · J. Rosiek🇵🇱 · K. Suxho🇬🇷

   We assume that New Physics effects are parametrized within the Standard Model Effective Field Theory (SMEFT) written in a complete basis of gauge invariant operators up to dimension 6, commonly referred to as "Warsaw basis". We discuss all steps necessary to obtain a consistent transition to the spontaneously broken theory and several other important aspects, including the BRST-invariance of the SMEFT action for linear $R_{\xi }$-gauges. The final theory is expressed in a basis characterized by SM-like propagators for all physical and unphysical fields. The effect of the non-renormalizable operators appears explicitly in triple or higher multiplicity vertices. In this mass basis we derive the complete set of Feynman rules, without resorting to any simplifying assumptions such as baryon-, lepton-number or CP conservation. As it turns out, for most SMEFT vertices the expressions are reasonably short, with a noticeable exception of those involving 4, 5 and 6 gluons. We have also supplemented our set of Feynman rules, given in an appendix here, with a publicly available Mathematica code working with the FeynRules package and producing output which can be integrated with other symbolic algebra or numerical codes for automatic SMEFT amplitude calculations.

   hep-phJHEP(2017)·192 citations
2. 02*

   Impact of standard neutrino oscillations and systematics in proton lifetime measurements

   D. R. Gratieri🇧🇷 · M. M. Guzzo🇧🇷 · O. L. G. Peres🇧🇷

   We use atmospheric neutrino phenomenology to obtain the expected background to proton decay in large underground neutrino detectors, like DUNE. We introduced, for the first time in this kind of analysis, the experimentally confirmed neutrino oscillations of the atmospheric neutrino observations which reduce by a factor of 40\% the corresponding background for nucleon decay channel $p\to {\mu }^{+}+{\pi }^0$. Furthermore, we infer the impact of four systematics on such background: the overall efficiency, the muon reconstruction energy resolution, the resonant neutral pion cross-section and the neutral pion angular resolution. Considering a 40 kton detector with efficiency 45\%, our analysis leads to an error band in the lower limit for the proton lifetime, from $7.9\times 10^{33}$~years to {\bf $1.1\times 10^{34}$}~years at $90\%$~C.L.. These numbers can be compared with the current mode dependent experimental limits $\tau >10^{31}-10^{33}$~years at $90\%$~C.L.. Finally we investigate how this limit can be further improved with the enhancement of the efficiency of the experiment which can be obtained, for instance, with the implementation of the ARAPUCA device in DUNE.

   hep-phJ.Phys.G(2019)·3 citations
3. 03*

   Quenching of vector boson-tagged jets at the LHC

   Hongxi Xing🇺🇸

   Electroweak boson-tagged jet measurements provide a promising experimental channel to accurately study the physics of jet production and propagation in dense QCD medium. In this talk, we present theoretical predictions for the nuclear-induced attenuation of the differential cross section for isolated photon-tagged and ${\mathrm{Z}}^0$-tagged jet production in heavy ion collisions, and provide theoretical interpretations to the recent LHC data. We demonstrate quantitatively the significance of collisional and radiative energy losses, as revealed in the strong momentum asymmetry $d\sigma /d{x}_{VJ}$ and nuclear modification ${\mathrm{I}}_{\mathrm{AA}}$ in central lead-lead reactions.

   hep-phnucl-thNPA(2017)·0 citations
4. 04*

   On the Seesaw Scale in Supersymmetric SO(10) Models

   Zhenxin Ren🇨🇳 · Da-Xin Zhang🇨🇳

   The seesaw mechanism, which is responsible for the description of neutrino masses and mixing, requires a scale lower than the unification scale. We propose a new model with spinor superfields playing important roles to generate this seesaw scale, with special attention paid on the Goldstone mode of the $U(1{)}_{B-L}$ symmetry breaking.

   hep-phEur.Phys.J.Plus(2017)·3 citations
5. 05*

   Cabibbo-Kobayashi-Maskawa-favored $B$ decays to a scalar meson and a $D$ meson

   Zhi-Tian Zou🇨🇳 · Ying Li🇨🇳 · Xin Liu🇨🇳

   Within the perturbative QCD approach, we investigated the Cabibbo-Kobayashi-Maskawa-favored $B\to \overline{D}S$ ("$S$" denoting the scalar meson) decays on the basis of the two-quark picture. Supposing the scalar mesons are the ground states or the first excited states, we calculated the the branching ratios of 72 decay modes. Most of the branching ratios are in the range $10^{-4}$ to $10^{-7}$, which can be tested in the ongoing LHCb experiment and the forthcoming Belle-II experiment. Some decays, such as $B^{+}\to {\overline{D}}^{(\ast )0}{a}_0^{+}(980/1450)$ and $B^{+}\to D^{(\ast )-}{a}_0^{+}(980/1450)$, could be used to probe the inner structure and the character of the scalar mesons, if the experiments are available. In addition, the ratios between the $Br(B^0\to {\overline{D}}^{(\ast )0}\sigma )$ and $Br(B^0\to {\overline{D}}^{(\ast )0}{f}_0(980))$ provide a potential way to determine the mixing angle between $\sigma$ and $f_0(980)$. Moreover, since in the standard model these decays occur only through tree operators and have no $CP$ asymmetries, any deviation will be signal of the new physics beyond the standard model.

   hep-phEPJC(2017)·12 citations
6. 06*

   Signals of Leptophilic Dark Matter at the ILC

   Sukanta Dutta🇮🇳 · Bharti Rawat🇮🇳 · Divya Sachdeva🇮🇳

   Adopting a model independent approach, we constrain the various effective interactions of leptophilic DM particle with the visible world from the WMAP and Planck data. The thermally averaged indirect DM annihilation cross-section and the DM-electron direct-detection cross-section for such a DM candidate are observed to be consistent with the respective experimental data. We study the production of cosmologically allowed leptophilic DM in association with $Z(Z\to f\bar{f})$, $f\equiv q,e^{-},{\mu }^{-}$ at the ILC. We perform the ${\chi }^2$ analysis and compute the 99\% C.L. acceptance contours in the $m_{\chi }$ and $\Lambda$ plane from the two dimensional differential distributions of various kinematic observables obtained after employing parton showering and hadronization to the simulated data. We observe that the dominant hadronic channel provides the best kinematic reach of 2.62 TeV ($m_{\chi }$ = 25 GeV), which further improves to 3.13 TeV for polarized beams at $\sqrt{s}=1$ TeV and an integrated luminosity of 1 ab${}^{-1}$.

   hep-phEPJC(2017)·31 citations
7. 07*

   Constraining the Mass Scale of a Lorentz-Violating Hamiltonian with the Measurement of Astrophysical Neutrino-Flavor Composition

   Kwang-Chang Lai🇹🇼 · Wei-Hao Lai🇹🇼 · Guey-Lin Lin🇹🇼

   We study Lorentz violation effects on flavor transitions of high energy astrophysical neutrinos. It is shown that the appearance of Lorentz violating Hamiltonian can drastically change the flavor transition probabilities of astrophysical neutrinos. Predictions of Lorentz violation effects on flavor compositions of astrophysical neutrinos arriving on Earth are compared with IceCube flavor composition measurement which analyzes astrophysical neutrino events in the energy range between $25\mathrm{TeV}$ and $2.8\mathrm{PeV}$. Such a comparison indicates that the future IceCube-Gen2 will be able to place stringent constraints on Lorentz violating Hamiltonian in the neutrino sector. We work out the expected sensitivities by IceCube-Gen2 on dimension-$3$ CPT-odd and dimension-$4$ CPT-even operators in Lorentz violating Hamiltonian. The expected sensitivities can improve on the current constraints obtained from other types of experiments by more than two orders of magnitudes for certain range of the parameter space.

   hep-phastro-ph.HEhep-exPRD(2017)·8 citations
8. 08*

   Status of nuclear PDFs after the first LHC p-Pb run

   Hannu Paukkunen🇫🇮

   In this talk, I overview the recent progress on the global analysis of nuclear parton distribution functions (nuclear PDFs). After first introducing the contemporary fits, the analysis procedures are quickly recalled and the ambiguities in the use of experimental data outlined. Various nuclear-PDF parametrizations are compared and the main differences explained. The effects of nuclear PDFs in the LHC p-Pb hard-process observables are discussed and some future prospects sketched.

   hep-phhep-exnucl-thNPA(2017)·18 citations
9. 09*

   Latest results from the EbyE NLO EKRT model

   Kari J. Eskola🇫🇮 · Harri Niemi🇩🇪 · Risto Paatelainen🇫🇮 · Kimmo Tuominen🇫🇮

   We review the results from the event-by-event next-to-leading order perturbative QCD + saturation + viscous hydrodynamics (EbyE NLO EKRT) model. With a simultaneous analysis of LHC and RHIC bulk observables we systematically constrain the QCD matter shear viscosity-to-entropy ratio eta/s(T), and test the initial state computation. In particular, we study the centrality dependences of hadronic multiplicities, pT spectra, flow coefficients, relative elliptic flow fluctuations, and various flow-correlations in 2.76 and 5.02 TeV Pb+Pb collisions at the LHC and 200 GeV Au+Au collisions at RHIC. Overall, our results match remarkably well with the LHC and RHIC measurements, and predictions for the 5.02 TeV LHC run are in an excellent agreement with the data. We probe the applicability of hydrodynamics via the average Knudsen numbers in the space-time evolution of the system and viscous corrections on the freeze-out surface.

   hep-phnucl-thNPA(2017)·13 citations
10. 10*

    Possibility of the existence of charmed exotica

    Hyun-Chul Kim🇰🇷 · Maxim V. Polyakov🇷🇺 · Michał Praszałowicz🇵🇱

    We employ the chiral quark-soliton model to describe excited baryons with one heavy quark. Identifying known charmed baryons with multiplets allowed by the model, we argue that apart from regular excitations of the ground state multiplets, some of recently reported by the LHCb collaboration narrow ${\Omega }_c^0$ states, may correspond to the exotic pentaquarks. This interpretation can be easily verified experimentally, since exotic ${\Omega }_c^0$ states -- contrary to the regular excitations -- form isospin triplets, rather than singlets.

    hep-phhep-exPRD(2017)·84 citations
11. 11*

    Understanding the muon anomalous magnetic moment in light of a flavor symmetry-based Minimal Supersymmetric Standard Model

    Mureed Hussain🇵🇰 · Rizwan Khalid🇵🇰

    We investigate whether the Minimal Supersymmetric Standard Model with the scalar masses of the third generation distinct from the first two, in order to be able to accommodate the muon anomalous magnetic moment, is consistent with the latest results from LHCb, direct collider bounds from the ATLAS and CMS experiments. In particular, we show that this class of models allows for satisfying both the constraints from the muon $(g-2{)}_{\mu }$ experiment and various bounds from the LHC. In addition, such models can also explain the observed dark matter relic density.

    hep-phPTEP(2018)·8 citations
12. 12*

    Analysis of the mass and width of the $X^{\ast }(3860)$ with QCD sum rules

    Zhi-Gang Wang🇨🇳

    In this article, we tentatively assign the $X^{\ast }(3860)$ to be the $C{\gamma }_5\otimes {\gamma }_{5}C$ type scalar tetraquark state, study its mass and width with the QCD sum rules, special attention is paid to calculating the hadronic coupling constants $G_{X{\eta }_c\pi }$ and $G_{XDD}$ concerning the tetraquark state. We obtain the values $M_X=3.86\pm 0.09\mathrm{GeV}$ and ${\Gamma }_X=202\pm 146\mathrm{MeV}$, which are consistent with the experimental data. The numerical result supports assigning the $X^{\ast }(3860)$ to be the $C{\gamma }_5\otimes {\gamma }_{5}C$ type scalar tetraquark state.

    hep-phEPJA(2017)·16 citations
13. 13*

    Multi-component Fermionic Dark Matter and IceCube PeV scale Neutrinos in Left-Right Model with Gauge Unification

    Debasish Borah🇮🇳 · Arnab Dasgupta🇮🇳 · Ujjal Kumar Dey🇮🇳 · Sudhanwa Patra🇮🇳 · Gaurav Tomar🇮🇳

    We consider a simple extension of the minimal left-right symmetric model (LRSM) in order to explain the PeV neutrino events seen at the IceCube experiment from a heavy decaying dark matter. The dark matter sector is composed of two fermions: one at PeV scale and the other at TeV scale such that the heavier one can decay into the lighter one and two neutrinos. The gauge annihilation cross sections of PeV dark matter are not large enough to generate its relic abundance within the observed limit. We include a pair of real scalar triplets ${\Omega }_{L,R}$ which can bring the thermally overproduced PeV dark matter abundance into the observed range through late time decay and consequent entropy release thereby providing a consistent way to obtain the correct relic abundance without violating the unitarity bound on dark matter mass. Another scalar field, a bitriplet under left-right gauge group is added to assist the heavier dark matter decay. The presence of an approximate global $U(1{)}_X$ symmetry can naturally explain the origin of tiny couplings required for long-lived nature of these decaying particles. We also show, how such an extended LRSM can be incorporated within a non-supersymmetric $SO(10)$ model where the gauge coupling unification at a very high scale naturally accommodate a PeV scale intermediate symmetry, required to explain the PeV events at IceCube.

    hep-phastro-ph.COJHEP(2017)·53 citations
14. 14*

    Bound state equation for the Nakanishi weight function

    J. Carbonell🇫🇷 · T. Frederico🇧🇷 · V.A. Karmanov🇷🇺

    The bound state Bethe-Salpeter amplitude was expressed by Nakanishi using a two-dimensional integral representation, in terms of a smooth weight function $g$, which carries the detailed dynamical information. A similar, but one-dimensional, integral representation can be obtained for the Light-Front wave function in terms of the same weight function $g$. By using the generalized Stieltjes transform, we first obtain $g$ in terms of the Light-Front wave function in the complex plane of its arguments. Next, a new integral equation for the Nakanishi weight function $g$ is derived for a bound state case. It has the standard form $g=Ng$, where $N$ is a two-dimensional integral operator. We give the prescription for obtaining the kernel $N$ starting with the kernel $K$ of the Bethe-Salpeter equation. The derivation is valid for any kernel given by an irreducible Feynman amplitude.

    hep-phhep-thnucl-thPLB(2017)·23 citations
15. 15*

    Explore Inert Dark Matter Blind Spots with Gravitational Wave Signatures

    Fa Peng Huang🇨🇳 · Jiang-Hao Yu🇺🇸

    Motivated by the absence of dark matter signals in direct detection experiments and the discovery of gravitational waves (GWs) at aLIGO, we discuss the possibility to explore a generic classes of scalar dark matter models using the complementary searches via phase transition gravitational waves and the future lepton collider signatures. We focus on the inert scalar multiplet dark matter models and the mixed inert scalar dark matter models, which could undergo a strong first-order phase transitions during the evolution of the early universe, and might produce detectable phase transition GW signals at future GW experiments, such as eLISA, DECIGO and BBO. We find that the future GW signature, together with circular electron-positron collider, could further explore the model's blind spot parameter region, at which the dark matter-Higgs coupling is identically zero, thus avoiding the dark matter spin-independent direct detection constraints.

    hep-phPRD(2018)·81 citations
16. 16*

    Four-loop renormalization of QCD with a reducible fermion representation of the gauge group: anomalous dimensions and renormalization constants

    K. G. Chetyrkin🇩🇪 · M. F. Zoller🇨🇭

    We present analytical results at four-loop level for the renormalization constants and anomalous dimensions of an extended QCD model with one coupling constant and an arbitrary number of fermion representations. One example of such a model is the QCD plus gluinos sector of a supersymmetric theory where the gluinos are Majorana fermions in the adjoint representation of the gauge group. The renormalization constants of the gauge boson, ghost and fermion fields are analytically computed as well as those for the ghost-gluon vertex, the fermion-gluon vertex and the fermion mass. All other renormalization constants can be derived from these. Some of these results were already produced in Feynman gauge for the computation of the beta-function of this model, which was recently published. Here we present results for an arbitrary gauge parameter.

    hep-phJHEP(2017)·9 citations
17. 17*

    Dark Matter in $E_6$ Grand Unification

    Jakob Schwichtenberg🇩🇪

    We discuss fermionic dark matter in non-supersymmetric $E_6$ Grand Unification. The fundamental representation of $E_6$ contains, in addition to the standard model fermions, exotic fermions and we argue that one of them is a viable, interesting dark matter candidate. Its stability is guaranteed by a discrete remnant symmetry, which is an unbroken subgroup of the $E_6$ gauge symmetry. We compute the symmetry breaking scales and the effect of possible threshold corrections by solving the renormalization group equations numerically after imposing gauge coupling unification. Since the Yukawa couplings of the exotic and the standard model fermions have a common origin, the mass of the dark matter particles is constrained. We find a mass range of $10^8\text{ GeV}\lesssim m_{DM}\lesssim 10^{12}\text{ GeV}$ for our $E_6$ dark matter candidate, which is within the reach of next-generation direct detection experiments.

    hep-phJHEP(2018)·19 citations
18. 18*

    Physical Cosmological Constant in Asymptotically Background Free Quantum Gravity

    Ken-ji Hamada🇯🇵 · Mikoto Matsuda🇯🇵

    We study the effective potential in renormalizable quantum gravity with a single dimensionless conformal coupling without a Landau pole. In order to describe a background-free dynamics at the Planck scale and beyond, the conformal-factor field is quantized exactly in a nonperturbative manner. Since this field does not receive renormalization, the field-independent constant in the effective potential becomes itself invariant under the renormalization group flow. That is to say, it gives the physical cosmological constant. We explicitly calculate the physical cosmological constant at the one-loop level in the Landau gauge. We find that it is given by a function of renormalized quantities of the cosmological constant, the Planck mass and the coupling constant, and it should be the observed value. It will give a new perspective on the cosmological constant problem free from an ultraviolet cutoff.

    ↳ hep-thgr-qchep-phPRD(2017)·6 citations
19. 19*

    Ideal Walking Dynamics via a Gauged NJL Model

    Jarno Rantaharju🇺🇸 · Claudio Pica🇩🇰 · Francesco Sannino🇩🇰

    According to the Ideal Walking Technicolor paradigm large mass anomalous dimensions arise in gauged Nambu--Jona-Lasinio (NJL) models when the four-fermion coupling is sufficiently strong to induce spontaneous symmetry breaking in an otherwise conformal gauge theory. We therefore study the $SU(2)$ gauged NJL model with two adjoint fermions using lattice simulations. The model is in an infrared conformal phase at small NJL coupling while it displays a chirally broken phase at large NJL couplings. In the infrared conformal phase we find that the mass anomalous dimension varies with the NJL coupling reaching ${\gamma }_m\sim 1$ close to the chiral symmetry breaking transition, de facto making the present model the first explicit realization of the Ideal Walking scenario.

    ↳ hep-lathep-phPRD(2017)·15 citations
20. 20*

    How brightly does the Glasma shine? Photon production off-equilibrium

    Jürgen Berges🇩🇪 · Klaus Reygers🇩🇪 · Naoto Tanji🇩🇪 · Raju Venugopalan🇺🇸

    We present a parametric estimate of photon production at early times in heavy-ion collisions based on a consistent weak coupling thermalization scenario. We quantify the contribution of the off-equilibrium Glasma phase relative to that of a thermalized Quark-Gluon Plasma. Taking into account the constraints from charged hadron multiplicity data, the Glasma contribution is found to be significant especially for large values of the saturation scale.

    ↳ nucl-thhep-phNPA(2017)·7 citations
21. 21*

    Changing the prior: absolute neutrino mass constraints in nonlocal gravity

    Yves Dirian🇨🇭

    Prior change is discussed in observational constraints studies of nonlocally modified gravity. In the latter, a model characterized by a modification of the form $\sim m^{2}R{\square }^{-2}R$ to the Einstein-Hilbert action was compared against the base $\Lambda$CDM one in a Bayesian way. It was found that the competing modified gravity model is significantly disfavored (at $22$:$1$ in terms of betting-odds) against $\Lambda$CDM given CMB+SNIa+BAO data, because of a dominant tension appearing in the $H_0$-${\Omega }_M$ plan. We identify the underlying mechanism generating such a tension and show that it is mostly caused by the late-time, quite smooth, phantom nature of the effective dark energy described by the nonlocal model. We find possible solutions for it to be resolved and explore a given one that consists in extending the initial baseline from one massive neutrino eigenstate to three degenerate ones, whose absolute mass $\sum m_{\nu }/3$ is allowed to take values within a reasonable prior interval. As a net effect, the absolute neutrino mass is inferred to be non-vanishing at $2\sigma$ level, best-fitting at $\sum m_{\nu }\approx 0.21\mathrm{eV}$, and the Bayesian tension disappears rendering the nonlocal gravity model statistically equivalent to $\Lambda$CDM, given recent CMB+SNIa+BAO data. We also discuss constraints from growth rate measurements $f{\sigma }_8$ whose fit is found to be improved by a larger massive neutrino fraction as well. The $\nu$-extended nonlocal model also prefers a higher value of $H_0$ than $\Lambda$CDM, therefore in better agreement with local measurements.

    ↳ astro-ph.COgr-qchep-phPRD(2017)·44 citations
22. 22*

    Majorana flipping of quarkonium spin states in transient magnetic field

    Nirupam Dutta🇮🇳 · Surasree Mazumder🇮🇳

    We demonstrate that spin flipping transitions occur between various quarkonium spin states due to transient magnetic field produced in non central heavy ion collisions (HICs). The inhomogeneous nature of the magnetic field results in \textit{non adiabatic evolution} of (spin)states of quarkonia moving inside the transient magnetic environment. Our calculations explicitly show that the consideration of azimuthal inhomogeneity gives rise to dynamical mixing between different spin states owing to Majorana spin flipping. Notably, this effect of non-adiabaticity is novel and distinct from previously predicted mixing of the singlet and one of the triplet states of quarkonia in the presence of a static and homogeneous magnetic field.

    ↳ nucl-thhep-phEPJC(2018)·13 citations
23. 23*

    Experimental determination of $V_{us}$ from kaon decays

    Matthew Moulson🇮🇹

    The status of the experimental determination of $V_{us}$ from $K_{\ell 3}$ and $K_{\mu 2}$ decays is reviewed. Factors currently limiting the precision of the evaluation of $V_{us}$ from kaon decays and prospects for new measurements within the next few years are discussed.

    ↳ hep-exhep-phPoS(2017)·75 citations
24. 24*

    A hybrid approach to relativistic heavy-ion collisions at the RHIC BES energies

    Chun Shen🇺🇸 · Gabriel Denicol🇧🇷 · Charles Gale🇨🇦 · Sangyong Jeon🇨🇦 · Akihiko Monnai🇫🇷 · Bjoern Schenke🇺🇸

    Using a hybrid (viscous hydrodynamics + hadronic cascade) framework, we model the bulk dynamical evolution of relativistic heavy-ion collisions at Relativistic Heavy Ion Collider (RHIC) Beam Energy Scan (BES) collision energies, including the effects from non-zero net baryon current and its dissipative diffusion. This framework is in full (3+1)D, which allows us to study the non-trivial longitudinal structure and dynamics of the collision systems, for example baryon stopping and transport, as well as longitudinal fluctuations. For the first time, the quantitative effect of net-baryon diffusion on hadronic observables is addressed. Finally, we propose a dynamical initialization scheme to study the importance of the pre-equilibrium stage at the RHIC BES energies.

    ↳ nucl-thhep-phnucl-exNPA(2017)·46 citations
25. 25*

    Small-scale structure and 21cm fluctuations by primordial black holes

    Jinn-Ouk Gong🇰🇷 · Naoya Kitajima🇯🇵

    We discuss early structure formation of small scales sourced by primordial black holes (PBHs) which constitute a small part of present cold dark matter component. We calculate the mass function and power spectrum of haloes originated from the Poisson fluctuations of PBH number and show that the number of small haloes is significantly modified in the presence of PBHs even if their fraction accounts for only $10^{-4}$--$10^{-3}$ of total dark matter abundance. We then compute the subsequent 21cm signature from those haloes. We find that PBHs can provide major contributions at high redshifts within the detectability of future experiments such as Square Kilometer Array, and provide a forecast constraint on the PBH fraction.

    ↳ astro-ph.COhep-phJCAP(2017)·54 citations
26. 26*

    Radiation and energy release in a background field of axion-like dark matter

    Wei Liao🇨🇳

    We find that a fuzzy dark matter background and the mG scale magnetic field in the galactic center can give rise to a radiation with a very large energy release. The frequency of the radiation field is the same as the frequency of the oscillating axion-like background field. We show that there is an energy transfer between the fuzzy dark matter sector and the electromagnetic sector because of the presence of the generated radiation field and the galactic magnetic field. The energy release rate of radiation is found to be very slow in comparison with the energy of fuzzy dark matter but could be significant comparing with the energy of galactic magnetic field in the source region. Using this example, we show that the fuzzy dark matter together with a large scale magnetic field is possible to give rise to fruitful physics.

    ↳ astro-ph.COastro-ph.GAhep-phPLB(2017)·1 citation
27. 27*

    A Detailed Study and Synthesis of Flow Observables in the IP-Glasma+MUSIC+UrQMD Framework

    Scott McDonald🇨🇦 · Chun Shen🇺🇸 · Francois Fillion-Gourdeau🇨🇦 · Sangyong Jeon🇨🇦 · Charles Gale🇨🇦

    In this work we use the IP-Glasma+MUSIC+UrQMD framework to systematically study a wide range of hadronic flow observables at 2.76 TeV. In addition to the single particle spectra and anisotropic flow coefficients $v_n$ previously studied in \cite{1609.02958}, we consider event-plane correlations, non-linear response coefficients ${\chi }_{npq}$, and event shape engineering. Taken together, these observables provide a wealth of insight into the collective behavior of the QGP and initial state fluctuations. They shed light on flow fluctuations, flow at fixed system size but different initial geometries, as well as the non-linear hydrodynamic response to the initial state spatial eccentricities. By synthesizing this information we can gain further insight into the transport properties of the QGP as well as the fluctuation spectrum of the initial state.

    ↳ nucl-thhep-phnucl-exNPA(2017)·8 citations
28. 28*

    Simulating chiral magnetic effect and anomalous transport phenomena in the pre-equilibrium stages of heavy-ion collisions

    Mark Mace🇺🇸 · Niklas Mueller🇩🇪 · Soeren Schlichting🇺🇸 · Sayantan Sharma🇺🇸

    We present a first principles approach to study the Chiral Magnetic Effect during the pre-equilibrium stage of a heavy-ion collision. We discuss the dynamics of the Chiral Magnetic Effect and Chiral Magnetic Wave based on real-time lattice simulations with dynamical (Wilson and Overlap) fermions simultaneously coupled to color and electromagnetic fields. While for light quarks we observe a dissipation-less transport of charges as in anomalous hydrodynamics, we demonstrate that for heavier quarks the effects of explicit chiral symmetry breaking lead to a significant reduction of the associated currents.

    ↳ hep-lathep-phnucl-thNPA(2017)·6 citations
29. 29*

    Pre-equilibrium Longitudinal Flow in the IP-Glasma Framework for Pb+Pb Collisions at the LHC

    Scott McDonald🇨🇦 · Chun Shen🇺🇸 · Francois Fillion-Gourdeau🇨🇦 · Sangyong Jeon🇨🇦 · Charles Gale🇨🇦

    In this work, we debut a new implementation of IP-Glasma and quantify the pre-equilibrium longitudinal flow in the IP-Glasma framework. The saturation physics based IP-Glasma model naturally provides a non-zero initial longitudinal flow through its pre-equilibrium Yang-Mills evolution. A hybrid IP-Glasma+MUSIC+UrQMD frame- work is employed to test this new implementation against experimental data and to make further predictions about hadronic flow observables in Pb+Pb collisions at 5.02 TeV. Finally, the non-zero pre-equilibrium longitudinal flow of the IP-Glasma model is quantified, and its origin is briefly discussed.

    ↳ nucl-thhep-phnucl-exNucl.Part.Phys.Proc.(2017)·3 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.