|
|
|
题名
|
作者
|
年代
|
出处
|
被引量
|
| 1 | Gravitational waves from dark first order phase transitions and dark photons显示文摘Cold Dark Matter particles may interact with ordinary particles through a dark photon, which acquires a mass thanks to a spontaneous symmetry breaking mechanism. We discuss a dark photon model in which the scalar singlet associated to the spontaneous symmetry breaking has an effective potential that induces a first order phase transition in the early Universe. Such a scenario provides a rich phenomenology for electron-positron colliders and gravitational waves interferometers, and may be tested in several different channels. The hidden first order phase transition implies the emission of gravitational waves signals, which may constrain the dark photon's space of parameters. Compared limits from electron-positron colliders, astrophysics, cosmology and future gravitational waves interferometers such as eLISA, U-DECIGO and BBO are discussed. This highly motivates a cross-checking strategy of data arising from experiments dedicated to gravitational waves, meson factories, the International Linear Collider(ILC), the Circular Electron Positron Collider(CEPC) and other underground direct detection experiments of cold dark matter candidates. | Andrea Addazi Antonino Marcianò | 2018 | Chinese Physics C2018，42，2： | 1 |
| 2 | Testing B-violating signatures from exotic instantons in future colliders显示文摘We discuss possible implications of exotic stringy instantons for baryon-violating signatures in future colliders.In particular,we discuss high-energy quark collisions and Λ-ˉΛ transitions.In principle,the Λ-ˉΛ process can be probed by high-luminosity electron-positron colliders.However,we find that an extremely high luminosity is needed in order to provide a(somewhat) stringent bound compared to the current data on NN →ππ,KK.On the other hand,(exotic) instanton-induced six-quark interactions can be tested in near future high-energy colliders beyond LHC,at energies around 20-100 Te V.The Super proton-proton Collider(Spp C) would be capable of such measurement given the proposed energy level of 50–90 Te V.Comparison with other channels is made.In particular,we show the compatibility of our model with neutron-antineutron and NN→ππ,KK bounds. | Andrea Addazi Xian-Wei Kang Maxim Yu. Khlopov | 2017 | Chinese Physics C2017，41，9： | 0 |
| 3 | Chapter 5 Dark Matter and New Physics Beyond the Standard Model with LHAASO显示文摘In order to reveal the nature of dark matter,it is crucial to detect its non-gravitational interactions with the standard model particles.The traditional dark matter searches focused on the so-called weakly interacting massive particles.However,this paradigm is strongly constrained by the null results of current experiments with high precision.Therefore there is a renewed interest of searches for heavy dark matter particles above TeV scale.The Large High Altitude Air Shower Observatory(LHAASO)with large effective area and strong background rejection power is very suitable to investigate the gamma-ray signals induced by dark matter annihilation or decay above TeV scale.In this document,we review the theoretical motivations and background of heavy dark matter.We review the prospects of searching for the gamma-ray signals resulted from dark matter in the dwarf spheroidal satellites and Galactic halo for LHAASO,and present the projected sensitivities.We also review the prospects of searching for the axion-like particles,which are a kind of well motivated light pseudo-scalars,through the LHAASO measurement of the very high energy gamma-ray spectra of astrophysical sources. | 毕效军 Andrea Addazi Konstantin Belotsky Vitaly Beylin Marco Cirelli Arman Esmaili Nicolao Fornengo 甘庆余 Michael Kachekriess Maxim Khlopov Vladimir Korchagin Alexander Korochkin Vladimir Kuksa Antonino Marciano Andrei Neronov Paolo Panci Roman Pasechnick Alexander Sakharov Filippo Sala Giuseppe Di Sciascio Dimiri Semikoz Pasquale Dario Serpico Nikolay Volchanskiy 殷鹏飞 | 2022 | Chinese Physics C2022，46，3： | 0 |
| 4 | Limiting majoron self-interactions from gravitational wave experiments显示文摘We show how majoron models may be tested/limited in gravitational wave experiments. In particular,the majoron self-interaction potential may induce a first order phase transition, producing gravitational waves from bubble collisions. We dub such a new scenario the violent majoron model, because it would be associated with a violent phase transition in the early Universe. Sphaleron constraints can be avoided if the global U(1)_(B-L) is broken at scales lower than the electroweak scale, provided that the B-L spontaneously breaking scale is lower than10 TeV in order to satisfy the cosmological mass density bound. The possibility of a sub-electroweak phase transition is practically unconstrained by cosmological bounds and it may be detected within the sensitivity of the next generation of gravitational wave experiments: eLISA, DECIGO and BBO. We also comment on its possible detection in the next generation of electron-positron colliders, where majoron production can be observed from the Higgs portals in missing transverse energy channels. | Andrea Addazi Antonino Marcianò | 2018 | Chinese Physics C2018，42，2： | 0 |
| 5 | Time-crystal ground state and production of gravitational waves from QCD phase transition显示文摘We propose a novel mechanism for the production of gravitational waves in the early Universe that originates from the relaxation processes induced by the QCD phase transition. While the energy density of the quark-gluon mean-field is monotonously decaying in real time, its pressure undergoes a series of violent oscillations at the characteristic QCD time scales that generate a primordial multi-peaked gravitational waves signal in the radio frequencies’ domain. The signal is an echo of the QCD phase transition that is accessible by planned measurements at the FAST and SKA telescopes. | Andrea Addazi Antonino Marcianò Roman Pasechnik | 2019 | Chinese Physics C2019，43，6： | 0 |
| 6 | NANOGrav results and dark first order phase transitions显示文摘The recent NANOGrav evidence of a common-source stochastic background provides a hint to gravitational waves(GW)radiation from the Early Universe.We show that this result can be interpreted as a GW spectrum produced from first order phase transitions(FOPTs)around a temperature in the keV-MeV window.Such a class of FOPTs at temperatures much below the electroweak scale can be naturally envisaged in several warm dark matter models such as Majoron dark matter. | Andrea Addazi Yi-Fu Cai Qingyu Gan Antonino Marciano Kaiqiang Zeng | 2021 | Science China(Physics,Mechanics & Astronomy)2021，64，9： | 0 |
| 7 | Super-light baryo-photons, weak gravity conjecture and exotic instantons in neutron-antineutron transitions显示文摘In companion papers(A. Addazi, Nuovo Cim. C, 38(1): 21(2015); A. Addazi, Z. Berezhiani, and Y. Kamyshkov, ar Xiv:1607.00348), we have discussed current bounds on a new super-light baryo-photon, associated with a U(1)B-L gauge, from current neutron-antineutron data, which are competitive with E¨otv¨os-type experiments.Here, we discuss the implications of possible baryo-photon detection in string theory and quantum gravity. The discovery of a very light gauge boson should imply violation of the weak gravity conjecture, carrying deep consequences for our understanding of holography, quantum gravity and black holes. We also show how the detection of a baryophoton would exclude the generation of all B-L violating operators from exotic stringy instantons. We will argue against the common statement in the literature that neutron-antineutron data may indirectly test at least the 300-1000 Te V scale. Searches for baryo-photons can provide indirect information on the Planck(or string) scale(quantum black holes, holography and non-perturbative stringy effects). This strongly motivates new neutron-antineutron experiments with adjustable magnetic fields dedicated to the detection of super-light baryo-photons. | Andrea Addazi | 2018 | Chinese Physics C2018，42，5： | 0 |
| 8 | Dark matter and baryogenesis in the Fermi-bounce curvaton mechanism显示文摘We elaborate on a toy model of matter bounce, in which the matter content is constituted by two fermion species endowed with four fermion interaction terms. We describe the curvaton mechanism that is thus generated, and then argue that one of the two fermionic species may realize baryogenesis, while the other(lighter) one is compatible with constraints on extra hot dark matter particles. | Andrea Addazi Stephon Alexander 蔡一夫 Antonino Marcianò | 2018 | Chinese Physics C2018，42，6： | 0 |
| 9 | Dynamical interactions of dark energy and dark matter:Yang-Mills condensate and QCD axions显示文摘We analyze a model of cold axion dark matter weakly coupled with a dark gluon condensate,reproducing dark energy.We first review how to recover the dark energy behavior using the functional renormalization group approach,and ground our study in the properties of the effective Lagrangian,to be determined non-perturbatively.Then,within the context of G_(SM)×SU(2)_D×U(1)_(P Q),we consider Yang-Mills condensate(YMC)interactions with QCD axions.We predict a transfer of dark energy density into dark matter density,that can be tested in the next generation of experiments dedicated to dark energy measurements.We obtain new bounds on the interactions between the Yang-Mills condensate and axion dark matter from Planck data:the new physics interaction scale related to the axion/gluon condensate mixing is constrained to be higher than the 10~6GeV energy scale. | Andrea Addazi Pietro Donà Antonino Marcianò | 2018 | Chinese Physics C2018，42，7： | 0 |
| 10 | A new duality between topological M-theory and loop quantum gravity显示文摘M-theory and loop quantum gravity (LQG)are usually accounted as the favored candidates to solve the problem of quantum gravity.Nonetheless,both the frameworks are still concerned with several technical and conceptual issues,and the lack of any direct experimental data on the string/Planck scale only allows to focus on the mathematical self-consistency of the two frameworks. | Andrea Addazi Antonino Marcianò | 2018 | Science China(Physics,Mechanics & Astronomy)2018，61，12： | 0 |
| 11 | Quantum ekpyrotic mechanism in Fermi-bounce curvaton cosmology显示文摘Within the context of the Fermi-bounce curvaton mechanism,we analyze the one-loop radiative corrections to the four-fermion interaction,generated by the non-dynamical torsion field in the Einstein-Cartan-Holst-Sciama-Kibble theory.We show that contributions that arise from the one-loop radiative corrections modify the energy-momentum tensor,mimicking an effective Ekpyrotic fluid contribution.Therefore,we call this effect quantum Ekpyrotic mechanism.This leads to the dynamical washing out of anisotropic contributions to the energy-momentum tensor,without introducing any new extra Ekpyrotic fluid.We discuss the stability of the bouncing mechanism and derive the renormalization group flow of the dimensional coupling constantξ,checking whether any change of its sign takes place towards the bounce.This enforces the theoretical motivations in favor of the torsion curvaton bounce cosmology as an alternative candidate to the inflation paradigm. | Andrea Addazi Antonino Marciano | 2020 | Chinese Physics C2020，44，10： | 0 |
| 12 | Testing noncommutative spacetimes and violations of the Pauli Exclusion Principle through underground experiments显示文摘We propose to deploy limits that arise from different tests of the Pauli Exclusion Principle: i) to provide theories of quantum gravity with experimental guidance; ii) to distinguish, among the plethora of possible models, the ones that are already ruled out by current data; iii) to direct future attempts to be in accordance with experimental constraints. We first review experimental bounds on nuclear processes forbidden by the Pauli Exclusion Principle,which have been derived by several experimental collaborations making use of various detector materials. Distinct features of the experimental devices entail sensitivities on the constraints hitherto achieved that may differ from one another by several orders of magnitude. We show that with choices of these limits, well-known examples of flat noncommutative space-time instantiations of quantum gravity can be heavily constrained, and eventually ruled out.We devote particular attention to the analysis of the κ-Minkowski and θ-Minkowski noncommutative spacetimes.These are deeply connected to some scenarios in string theory, loop quantum gravity, and noncommutative geometry.We emphasize that the severe constraints on these quantum spacetimes, although they cannot rule out theories of top-down quantum gravity to which they are connected in various ways, provide a powerful limitation for those models. Focus on this will be necessary in the future. | Andrea Addazi Pierluigi Belli Rita Bernabei Antonino Marcianò | 2018 | Chinese Physics C2018，42，9： | 0 |
您所在的机构暂未开通此部分的功能，请联系管理员