Wed·Jul 13, 2016Wednesday·July 13, 2016

1. 01*

   Short Range Correlations and the EMC Effect in Effective Field Theory

   Jiunn-Wei Chen🇹🇼 · William Detmold🇺🇸 · Joel E. Lynn🇩🇪 · Achim Schwenk🇩🇪

   We show that the empirical linear relation between the magnitude of the EMC effect in deep inelastic scattering on nuclei and the short range correlation scaling factor $a_2$ extracted from high-energy quasi-elastic scattering at $x\ge 1$ is a natural consequence of scale separation and derive the relationship using effective field theory. While the scaling factor $a_2$ is a ratio of nuclear matrix elements that individually depend on the calculational scheme, we show that the ratio is independent of this choice. We perform Green's function Monte Carlo calculations with both chiral and Argonne-Urbana potentials to verify this and determine the scaling factors for light nuclei. The resulting values for ${}^3$He and ${}^4$He are in good agreement with experimental values. We also present results for ${}^9$Be and ${}^{12}$C extracted from variational Monte Carlo calculations.

   hep-phhep-latnucl-exnucl-thPRL(2017)·76 citations
2. 02*

   Phases of Cannibal Dark Matter

   Marco Farina🇺🇸 · Duccio Pappadopulo🇺🇸 · Joshua T. Ruderman🇺🇸 · Gabriele Trevisan🇺🇸

   A hidden sector with a mass gap undergoes an epoch of cannibalism if number changing interactions are active when the temperature drops below the mass of the lightest hidden particle. During cannibalism, the hidden sector temperature decreases only logarithmically with the scale factor. We consider the possibility that dark matter resides in a hidden sector that underwent cannibalism, and has relic density set by the freeze-out of two-to-two annihilations. We identify three novel phases, depending on the behavior of the hidden sector when dark matter freezes out. During the cannibal phase, dark matter annihilations decouple while the hidden sector is cannibalizing. During the chemical phase, only two-to-two interactions are active and the total number of hidden particles is conserved. During the one way phase, the dark matter annihilation products decay out of equilibrium, suppressing the production of dark matter from inverse annihilations. We map out the distinct phenomenology of each phase, which includes a boosted dark matter annihilation rate, new relativistic degrees of freedom, warm dark matter, and observable distortions to the spectrum of the cosmic microwave background.

   hep-phastro-ph.COJHEP(2016)·126 citations
3. 03*

   Co-Decaying Dark Matter

   Jeff Asaf Dror🇺🇸 · Eric Kuflik🇺🇸 · Wee Hao Ng🇺🇸

   We propose a new mechanism for thermal dark matter freezeout, termed Co-Decaying Dark Matter. Multi-component dark sectors with degenerate particles and out-of-equilibrium decays can co-decay to obtain the observed relic density. The dark matter density is exponentially depleted through the decay of nearly degenerate particles, rather than from Boltzmann suppression. The relic abundance is set by the dark matter annihilation cross-section, which is predicted to be boosted, and the decay rate of the dark sector particles. The mechanism is viable in a broad range of dark matter parameter space, with a robust prediction of an enhanced indirect detection signal. Finally, we present a simple model that realizes co-decaying dark matter.

   hep-phastro-ph.COPRL(2016)·120 citations
4. 04*

   The two-jet rate in e^+e^- at next-to-next-to-leading-logarithmic order

   Andrea Banfi🇬🇧 · Heather McAslan🇬🇧 · Pier Francesco Monni🇬🇧 · Giulia Zanderighi🇨🇭

   We present the first next-to-next-to-leading logarithmic resummation for the two-jet rate in $e^{+}{e}^{-}$ annihilation in the Durham and Cambridge algorithms. The results are obtained by extending the ARES method to observables involving any global, recursively infrared and collinear safe jet algorithm in e^+e^- collisions. As opposed to other methods, this approach does not require a factorization theorem for the observables. We present predictions matched to next-to-next-to-leading order, and a comparison to LEP data.

   hep-phhep-exPRL(2016)·77 citations
5. 05*

   Forward di-jet production in p+Pb collisions in the small-x improved TMD factorization framework

   A. van Hameren🇵🇱 · P. Kotko🇺🇸 · K. Kutak🇵🇱 · C. Marquet🇫🇷 · E. Petreska🇫🇷 · S. Sapeta🇵🇱

   We study the production of forward di-jets in proton-lead and proton-proton collisions at the Large Hadron Collider. Such configurations, with both jets produced in the forward direction, impose a dilute-dense asymmetry which allows to probe the gluon density of the lead or proton target at small longitudinal momentum fractions. Even though the jet momenta are always much bigger than the saturation scale of the target, $Q_s$, the transverse momentum imbalance of the di-jet system may be either also much larger than $Q_s$, or of the order $Q_s$, implying that the small-$x$ QCD dynamics involved is either linear or non-linear, respectively. The small-$x$ improved TMD factorization framework deals with both situation in the same formalism. In the latter case, which corresponds to nearly back-to-back jets, we find that saturation effects induce a significant suppression of the forward di-jet azimuthal correlations in proton-lead versus proton-proton collisions.

   hep-phJHEP(2016)·112 citations
6. 06*

   The Excitation of the Global Symmetry-Breaking Vacuum in Composite Higgs Models

   Sylvain Fichet🇧🇷 · Gero von Gersdorff🇧🇷 · Eduardo Ponton🇧🇷 · Rogerio Rosenfeld🇧🇷

   We consider scenarios of Higgs compositeness where the Higgs doublet arises as a pseudo-Nambu Goldstone boson. Our focus is the physical scalar ("radial") excitation associated with the global symmetry breaking vacuum, which we call the "global Higgs". For the minimal case of a $SO(5)/SO(4)$ coset, the couplings of the global Higgs to Standard Model (SM) particles are fully determined by group theoretical factors and two decay constants. The global Higgs also couples to the composite resonances of the theory, inducing an interaction with the SM gauge bosons at one-loop. We thoroughly analyze representative fermionic sectors, considering a global Higgs both in the $5$ and $14$ representations of $SO(5)$ and taking into account the renormalization group evolution of couplings in the composite sector. We derive the one-loop effective couplings and all decays of the global Higgs, showing that its decay width over mass can range from $O(10^{-3})$ to $O(1)$. Because of the multiplicity of the resonances, the coupling of the global Higgs to gluons is sizeable, potentially opening a new window into composite models at the LHC.

   hep-phJHEP(2016)·35 citations
7. 07*

   Light speed variation from gamma-ray bursts

   Haowei Xu🇨🇳 · Bo-Qiang Ma🇨🇳

   The effect of quantum gravity can bring a tiny light speed variation which is detectable through energetic photons propagating from gamma ray bursts (GRBs) to an observer such as the space observatory. Through an analysis of the energetic photon data of the GRBs observed by the Fermi Gamma-ray Space Telescope (FGST), we reveal a surprising regularity of the observed time lags between photons of different energies with respect to the Lorentz violation factor due to the light speed energy dependence. Such regularity suggests a linear form correction of the light speed $v(E)=c(1-E/E_{\mathrm{LV}})$, where $E$ is the photon energy and $E_{\mathrm{LV}}=(3.60\pm 0.26)\times 10^{17}\mathrm{GeV}$ is the Lorentz violation scale measured by the energetic photon data of GRBs. The results support an energy dependence of the light speed in cosmological space.

   hep-phastro-ph.HEgr-qcAstropart.Phys.(2016)·99 citations
8. 08*

   ISR effects for resonant Higgs production at future lepton colliders

   Mario Greco🇮🇹 · Tao Han🇺🇸 · Zhen Liu🇺🇸

   We study the effects of the initial state radiation on the $s$-channel Higgs boson resonant production at ${\mu }^{+}{\mu }^{-}$ and $e^{+}{e}^{-}$ colliders by convoluting with the beam energy spread profile of the collider and the Breit-Wigner resonance profile of the signal. We assess their impact on both the Higgs signal and SM backgrounds for the leading decay channels $h\to b\bar{b},W{W}^{\ast }$. Our study improves the existing analyses of the proposed future resonant Higgs factories and provides further guidance for the accelerator designs with respect to the physical goals.

   hep-phhep-exPLB(2016)·60 citations
9. 09*

   Saturation scale fluctuations and multi-particle rapidity correlations

   Adam Bzdak🇵🇱 · Kevin Dusling🇺🇸

   We study the effect of intrinsic fluctuations of the proton saturation momentum scale on event-by-event rapidity distributions. Saturation scale fluctuations generate an asymmetry in the single particle rapidity distribution in each event resulting in genuine n-particle correlations having a component linear in the rapidities of the produced particles, $y_1\cdots y_n$. We introduce a color domain model that naturally explains the centrality dependence of the two-particle rapidity correlations recently measured by ATLAS while constraining the probability distribution of saturation scale fluctuations in the proton. Predictions for n = 4, 6 and 8 particle correlations find that the four and eight-particle cumulant change sign at an intermediate multiplicity, a signature which could be tested experimentally.

   hep-phnucl-thPRC(2016)·6 citations
10. 10*

    Understanding spin parity of $P_c(4450)$ and $Y(4274)$ in a hadronic molecular state picture

    Jun He🇨🇳

    The hidden-charmed pentaquark $P_c(4450)$ and the charmonium-like state $Y(4274)$ are investigated as a ${\bar{D}}^{\ast }{\Sigma }_c$ and a $D_s{\bar{D}}_{s0}(2317)$ molecular state, respectively. The spin parities of these two states cannot be well understood if only S-wave ${\bar{D}}^{\ast }{\Sigma }_c$ and $D_s{\bar{D}}_{s0}(2317)$ interactions are considered. In this work, the interactions are studied in a quasipotential Bethe-Salpeter equation approach with a partial wave decomposition on spin parity $J^P$, and the contributions of different partial waves are studied in a two-channel scattering model including a generating channel and an observation channel. Two poles at $4447\pm 4i$ and $4392\pm 46i$ MeV are produced from the ${\bar{D}}^{\ast }{\Sigma }_c$ interaction coupled with the $J/\psi p$ channel in $3/2^{-}$ wave and $5/2^{+}$ wave, respectively. The peak for the $5/2^{+}$ state has a comparable height as that of the $3/2^{-}$ state in the $J/\psi p$ invariant mass spectrum. The $D_s{\bar{D}}_{s0}(2317)$ interaction coupled with the $J/\psi \varphi$ channel is studied and a pole at $4275\pm 11i$ MeV is produced in $J^P=1^{+}$ wave, which corresponds to P-wave $D_s{\bar{D}}_{s0}(2317)$ interaction. The pole from S-wave $D_s{\bar{D}}_{s0}(2317)$ interaction is far below that from P-wave interaction even the $J/\psi \varphi$ threshold, so cannot be observed in the $J/\psi \varphi$ channel. The result suggests that in these cases a state carrying a spin parity corresponding to P-wave interaction should be taken as seriously as these carrying a spin parity corresponding to S-wave interaction in the hadronic molecular state picture.

    hep-phhep-exnucl-thPRD(2017)·53 citations
11. 11*

    Non-leptonic kaon decays at large $N_c$

    A. Donini🇪🇸 · P. Hernández🇪🇸 · C. Pena🇪🇸 · F. Romero-López🇪🇸

    We study the scaling with the number of colours, $N_c$, of the weak amplitudes mediating kaon mixing and decay. We evaluate the amplitudes of the two relevant current-current operators on the lattice for $N_c=3-7$. We conclude that the subleading $1/N_c$ corrections in ${\hat{B}}_K$ are small, but those in the $K\to \pi \pi$ amplitudes are large and fully anti-correlated in the $I=0,2$ isospin channels. We briefly comment on the implications for the $\Delta I=1/2$ rule.

    hep-phhep-latPRD(2016)·21 citations
12. 12*

    Baryogenesis in the two doublet and inert singlet extension of the Standard Model

    Tommi Alanne🇩🇰 · Kimmo Kainulainen🇫🇮 · Kimmo Tuominen🇫🇮 · Ville Vaskonen🇫🇮

    We investigate an extension of the Standard Model containing two Higgs doublets and a singlet scalar field (2HDSM). We show that the model can have a strongly first-order phase transition and give rise to the observed baryon asymmetry of the Universe, consistent with all experimental constraints. In particular, the constraints from the electron and neutron electric dipole moments are less constraining here than in pure two-Higgs-doublet model (2HDM). The two-step, first-order transition in 2HDSM, induced by the singlet field, may lead to strong supercooling and low nucleation temperatures in comparison with the critical temperature, $T_n\ll T_c$, which can significantly alter the usual phase-transition pattern in 2HD models with $T_n\approx T_c$. Furthermore, the singlet field can be the dark matter particle. However, in models with a strong first-order transition its abundance is typically but a thousandth of the observed dark matter abundance.

    hep-phastro-ph.COJCAP(2016)·46 citations
13. 13*

    Implications of Fermionic Dark Matter on recent neutrino oscillation data

    Shivaramakrishna Singirala🇮🇳

    We investigate flavor phenomenology and dark matter in the context of scotogenic model. In this model, the neutrino masses are generated through radiative corrections at one-loop level. Considering the neutrino mixing matrix to be of tri-bimaximal form with additional perturbations to accommodate the recently observed non-zero value of reactor mixing angle ${\theta }_{13}$, we obtain the relation between various neutrino oscillation parameters and the model parameters. Working in degenerate heavy neutrino mass spectrum, we obtain light neutrino masses obeying normal hierarchy and also study the relic abundance of fermionic dark matter candidate including co-annihilation effects. A viable parameter space is thus obtained, consistent with neutrino oscillation data, relic abundance and various lepton flavor violating decays such as ${\ell }_{\alpha }\to {\ell }_{\beta }\gamma$ and ${\ell }_{\alpha }\to 3{\ell }_{\beta }$.

    hep-phCPC(2017)·12 citations
14. 14*

    Detecting supernovae neutrino with Earth matter effect

    Wei Liao🇨🇳

    We study Earth matter effect in oscillation of supernovae neutrinos. We show that detecting Earth matter effect gives an independent measurement of spectra of supernovae neutrinos, i.e. the flavor difference of the spectra of supernovae neutrinos. We study the effect of energy resolution and angular resolution of final electron or positron on detecting the signal of Earth matter effect. We show that varying the widths of energy bins in analysis can change the signal strength of Earth matter effect and the statistical fluctuation. A reasonable choice of energy bins can both suppress the statistical fluctuation and make out a good signal strength relative to the statistical fluctuation. Neutrino detectors with good energy resolution and good angular resolution are therefore preferred so that there are more freedom to vary energy bins and to optimize the signal of Earth matter effect in analyzing events of supernovae neutrinos.

    hep-phastro-ph.HEhep-exPRD(2016)·8 citations
15. 15*

    Hidden Photon Compton and Bremsstrahlung in White Dwarf Anomalous Cooling and Luminosity Functions

    Chia-Feng Chang🇹🇼

    We computed the contribution of the Compton and Bremsstrahlung processes with a hidden light $U(1{)}_D$ neutral boson ${\gamma }_D$ to the white dwarf G117-B15A anomalous cooling rate, as well as the white dwarf luminosity functions (WDLF). We demonstrated that for a light mass of hidden photon ($m_{{\gamma }_D}\ll$ a few keV), compatible results are obtained for the recent Sloan Digital Sky Survey and the SuperCOSMOS Sky Survey observation, but the stringent limits would be imposed on the kinetic mixing $ϵ$. We performed ${\chi }^2$-tests to acquire a quantitative assessment on the WDLF data in the context of our model, computed under the assumption of different kinetic mixing $ϵ$, the age of the oldest computed stars $T_D$, and a constant star formation rate $\psi$. Then taken together, the WDLF analysis of 2$\sigma$ confidence interval $ϵ=\left(0.37_{-0.37}^{+0.35}\right)\times 10^{-14}$ is barely consistent with the cooling rate analysis at 2$\sigma$ regime $ϵ=\left(0.97_{-0.37}^{+0.35}\right)\times 10^{-14}$. The two approaches used here agree with each other in yielding an anomalous cooling rate of white dwarf in this luminosity range.

    hep-phastro-ph.HE4 citations
16. 16*

    Emergence of gauge invariance from Nambu models

    L. F. Urrutia🇲🇽

    In the framework of a hamiltonian nonperturbative approach we show that after demanding current conservation together with the Gauss constraints at some initial time in a nonabelian Nambu model, we recover the corresponding Yang-Mills theory. In this way, the spontaneous Lorentz symmetry breaking present in the Nambu model becomes unobservable and the Goldstone modes can be identified with the corresponding gauge bosons.

    hep-phhep-th0 citations
17. 17*

    Dynamically Generated $\Xi (1690)$

    Takayasu Sekihara (JAEA, Ibaraki)🇯🇵

    We show that the $\Xi (1690)$ resonance can be dynamically generated in the $s$-wave $\bar{K}\Sigma$-$\bar{K}\Lambda$-$\pi \Xi$-$\eta \Xi$ coupled-channels chiral unitary approach. In our model, the $\Xi (1690)$ resonance appears near the $\bar{K}\Sigma$ threshold as a $\bar{K}\Sigma$ molecular state and the experimental data are reproduced well. We discuss properties of the dynamically generated $\Xi (1690)$.

    hep-phhep-exhep-latnucl-ex+1JPS Conf.Proc.(2017)·2 citations
18. 18*

    Higgs mass from neutrino-messenger mixing

    Pritibhajan Byakti🇮🇳 · Charanjit K Khosa🇮🇳 · V. S. Mummidi🇮🇳 · Sudhir K Vempati🇮🇳

    The discovery of the Higgs particle at 125 GeV has put strong constraints on minimal messenger models of gauge mediation, pushing the stop masses into the multi-TeV regime. Extensions of these models with matter-messenger mixing terms have been proposed to generate a large trilinear parameter, $A_t$, relaxing these constraints. The detailed survey of these models \cite{Byakti:2013ti,Evans:2013kxa} so far considered messenger mixings with only MSSM superfields. In the present work, we extend the survey to MSSM with inverse-seesaw mechanism. The neutrino-sneutrino corrections to the Higgs mass in the inverse seesaw model are not significant in the minimal gauge mediation model, unless one considers messenger-matter interaction terms. We classify all possible models with messenger-matter interactions and perform thorough numerical analysis to find out the promising models. We found that out of the 17 possible models 9 of them can lead to Higgs mass within the observed value without raising the sfermion masses significantly. The successful models have stop masses $\sim$1.5 TeV with small or negligible mixing and yet a light CP even Higgs at 125 GeV.

    hep-phJHEP(2017)·3 citations
19. 19*

    The Impact of Lorentz Violation on the Klein Tunneling Effect

    Zhi Xiao🇺🇸

    We discuss the impact of a tiny Lorentz-violating $b^{\mu }$ term on the one dimensional motion of a Dirac particle scattering on a rectangular barrier. We assume the experiment is performed in a particular inertial frame, where the components of $b^{\mu }$ are assumed constants. The results show that Lorentz-violation modification to the transmission rate depends on the observer Lorentz nature of $b^{\mu }$. For a spacelike or lightlike $b^{\mu }$ the induced resonant frequency shift depends on the polarization, while for timelike $b^{\mu }$ there is essentially no modification.

    hep-ph0 citations
20. 20*

    Analysis of the strong coupling form factors of ${\Sigma }_{b}NB$ and ${\Sigma }_{c}ND$ in QCD sum rules

    Guo Liang Yu🇨🇳 · Zhi Gang Wang🇨🇳 · Zhen Yu Li🇨🇳

    In this article, we study the strong interaction of the vertexes ${\Sigma }_{b}NB$ and ${\Sigma }_{c}ND$ using the three-point QCD sum rules under two different dirac structures. Considering the contributions of the vacuum condensates up to dimension $5$ in the operation product expansion, the form factors of these vertexes are calculated. Then, we fit the form factors into analytical functions and extrapolate them into time-like regions, which giving the coupling constant. Our analysis indicates that the coupling constant for these two vertexes are $G_{{\Sigma }_{b}NB}=0.43\pm 0.01Ge{V}^{-1}$ and $G_{{\Sigma }_{c}ND}=3.76\pm 0.05Ge{V}^{-1}$.

    hep-phCPC(2017)·10 citations
21. 21*

    The Observed Diphoton Excess in F-theory Inspired Heterotic String-Derived Model

    Johar M. Ashfaque🇬🇧

    The production and the subsequent decay of the SM singlet via heavy vector--like colour triplets and electroweak doublets in one--loop diagrams can shed light on the recent observation of diphoton excess at the LHC. In this paper, the $E_6$ GUT is considered in the F-theory setting where the $E_6$ is broken by making use of the spectral cover construction and by turning on the hypercharge gauge flux. This paper is based on the results presented in \cite{Athanasopoulos:2014bba, Faraggi:2016xnm, Ashfaque:2016jha} which will be reviewed briefly. Here, by following the F-theory approach, akin to \cite{Karozas:2016hcp, Leontaris:2016wsy, Das:2016xuc}, we present a study of the flipped $SO(10)$ model embedded completely in the $E_6$ GUT but with a different accommodation of the SM representations in the $27$ of $E_6$.

    ↳ physics.gen-phhep-ph5 citations
22. 22*

    One spatial dimensional finite volume three-body interaction for a short-range potential

    Peng Guo🇺🇸

    In this work, we use McGuire's model to describe scattering of three spinless identical particles in one spatial dimension, we first present analytic solutions of Faddeev's equation for scattering of three spinless particles in free space. The three particles interaction in finite volume is derived subsequently, and the quantization conditions by matching wave functions in free space and finite volume are presented in terms of two-body scattering phase shifts. The quantization conditions obtained in this work for short range interaction are Lüscher's formula like and consistent with Yang's results in \cite{Yang:1967bm}.

    ↳ hep-lathep-phPRD(2017)·67 citations
23. 23*

    $B_s{\pi }^{+}$ scattering and search for X(5568) with lattice QCD

    C.B. Lang🇦🇹 · D. Mohler🇩🇪 · S. Prelovsek🇸🇮

    We investigate $B_s{\pi }^{+}$ scattering in s-wave using lattice QCD in order to search for an exotic resonance X(5568) with flavor $\bar{b}s\bar{d}u$; such a state was recently reported by D0 but was not seen by LHCb. If X(5568) with $J^P=0^{+}$ exists, it can strongly decay only to $B_s{\pi }^{+}$ and lies significantly below all other thresholds, which makes a lattice search for X(5568) cleaner and simpler than for other exotic candidates. Both an elastic resonance in $B_s{\pi }^{+}$ as well as a deeply bound $B^{+}{\bar{K}}^0$ would lead to distinct signatures in the energies of lattice eigenstates, which are not seen in our simulation. We therefore do not find a candidate for X(5568) with $J^P=0^{+}$ in agreement with the recent LHCb result. The extracted $B_s{\pi }^{+}$ scattering length is compatible with zero within the error.

    ↳ hep-lathep-phPRD(2016)·44 citations
24. 24*

    Compact Star Matter: EoS with New Scaling Law

    Kyungmin Kim🇰🇷 · Hyun Kyu Lee🇰🇷 · Jaehyun Lee🇰🇷

    In this paper we present a simple discussion on the properties of compact stars using an EoS obtained in effective field theory anchored on scale and hidden-local symmetric Lagrangian endowed with topology change and a unequivocal prediction on the deformation of the compact star, that could be measured in gravitational waves. The objective is not to offer a superior or improved EoS for compact stars but to confront with a forthcoming astrophysical observable the given model formulated in what is considered to be consistent with the premise of QCD. The model so obtained is found to satisfactorily describe the observation of a 2-solar mass neutron star with a minimum number of parameters. Specifically the observable we are considering in this paper is the tidal deformability parameter (equivalently the Love number k_2), which affects gravitational wave forms at the late period of inspiral stage. The forthcoming aLIGO and aVirgo observations of gravitational waves from binary neutron star system will provide a valuable guidance for arriving at a better understanding of highly compressed baryonic matter.

    ↳ nucl-thastro-ph.HEhep-phIJMPE(2017)·9 citations
25. 25*

    Exclusive production observed at the CMS experiment

    Ruchi Chudasama (for the CMS Collaboration)🇮🇳

    Exclusive W${}^{+}$W${}^{-}$ pair production in photon-photon collisions during the pp runs at 7 and 8 TeV are observed and used to put constraints on the Anomalous Quartic Gauge Couplings. During the proton lead collisions in photon-induced vector meson production is observed via the decay of upsilon into two muons. The slope of the squared p${}_{\mathrm{T}}$ distribution is measured to determine the size of the production region.

    ↳ hep-exhep-phPoS(2016)·1 citation
26. 26*

    Star-forming galaxies as the origin of IceCube neutrinos: Reconciliation with Fermi-LAT gamma rays

    Sovan Chakraborty🇩🇪 · Ignacio Izaguirre🇩🇪

    Cosmic ray accelerators like supernova and hypernova remnants in star forming galaxies are one of the most plausible sources of the IceCube observed diffuse astrophysical neutrinos. The neutrino producing hadronic processes will also produce a diffuse gamma ray flux, constrained by the Fermi-LAT bounds. The fact that point sources like blazars also contribute to the diffuse gamma ray flux implies large gamma opacity of the neutrino sources. Indeed, for these high redshift star forming galaxies the gamma absorption during the intergalactic propagation can be significant. In addition, large gamma attenuation inside these extreme source galaxies can reduce the cascade component of the diffuse flux. Under the current astrophysical uncertainties affecting these absorptions processes, we find the associated diffuse gamma ray flux can remain compatible with the current Fermi-LAT bounds.

    ↳ astro-ph.HEhep-ph17 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.