Sato pseudo-dirac dark matter pdf

We specify the parameters of a pseudo-Dirac fermion designed to explain the positron signal, and find that it annihilates chiefly to e+e- and freezes out with the correct relic density. We discuss possible observational consequences of this model.

Pseudo-Dirac bino dark matter Ken Hsieh* Department of Physics, University of Maryland, College Park, Maryland 20742, USA and Department of Physics, Michigan State University,…

Pseudo-Dirac dark matter is a viable type of dark matter which originates from a new Dirac fermion whose two Weyl states get slightly split in mass by a small Majorana term. The decay of the heavier to the lighter state naturally occurs over a detectable length scale. Thus, whenever pseudo-Dirac

Displaced vertex signatures of Pseudo-Dirac Dark Matter 2017-07-27 EDU, Quy Nhơn Thomas Jacques with Andrea De Simone, Alessandro Davoli, Veronica Sanz

Searches for Dark Matter produced in association with high transverse momentum jets or heavy flavours at the LHC Michaela Queitsch-Maitland (DESY, Hamburg) [ PDF ] (25’+5′)

Electroweak WIMPs are under intense scrutiny from direct detection, indirect detection, and collider experiments. Nonetheless the pure (pseudo-Dirac) higgsino, one of the simplest such WIMPs, remains elusive. We present an up-to-date assessment of current experimental constraints on neutralino dark matter. The strongest bound on pure higgsino

Abstract Resolving the nature of dark matter has become one of the foremost goals of particle physics. Pseudo-Dirac dark matter (pDDM) is a viable scenario featuring a Dirac fermion with two mass eigenstates split by a small Majorana mass term.

On Minimal Dark Matter coupled to the Higgs SpringerLink

Exciting dark matter and the INTEGRAL/SPI 511 keV signal

In particle physics, the Dirac equation is a relativistic wave equation derived by British physicist Paul Dirac in 1928. In its free form , or including electromagnetic interactions , it describes all spin- 1 / 2 massive particles such as electrons and quarks for which parity is a symmetry .

Oscillating Asymmetric Sneutrino Dark Matter from the Maximally U(1)L Supersymmetric Inverse Seesaw Shao-Long Chen1,2, and Zhaofeng Kang3, y 1Key Laboratory of Quark and Lepton Physics (MoE) and Institute of Particle Physics,

Pseudo-Dirac dark matter is a viable type of dark matter which originates from a new Dirac fermion whose two Weyl states get slightly split in mass by a small Majorana term. The decay of …

Prospects for Direct Dark Matter Searches in the Constrained 81 MSSM R. Trotta, R. R. de Austri and L. Roszkowski MACCHIOs as Cold Dark Matter ‘ 87

Inelastic dark matter has been shown to provide a compelling explanation for the signal in the DAMA experiments while remaining compatible with other direct DM searches such as CDMS, XENON, and CRESST for dark matter masses at least as large as 250 GeV [14].

For directional dark matter search with nuclear emulsion, we should detect submicron tracks of recoiled nuclei induced by dark matter because nuclear emulsion is a solid detector. However, the ordinary nuclear emulsion cannot detect the tracks shorter than 1µm because it

Symposium: New Generation Quantum Theory -Particle Physics, Cosmology, and Chemistry-Dark matter in universal extra dimension models Mitsuru Kakizaki (University of Toyama)

This solution involves Majorana neutrinos of the pseudo-Dirac type, i.e. m ( )A. GeiserrPhysics Letters B 444 1998 358–366 359 Fig. 1. Current indications for neutrino oscillations in the sin2 2u vs. Dm2 plane, assuming dominance of two flavour oscillations in each case.

A simple and natural model is presented that gives Dirac gauginos. The configuration is related to “deconstructed gaugino mediation”. A high energy completion is provided based on existing ISS-like models of deconstructed gaugino mediation. This provides a complete picture of Dirac gauginos that

This causes a mass splitting between Dirac states in the fermion sector and the neutralinos, which provide the dark matter candidate, become pseudo-Dirac states. We discuss two scenarios: the

We study the pseudo-Dirac mixing of left and right-handed neutrinos in the case where the Majorana masses M_L and M_R are small when compared with the Dirac…

We thus propose a simple extension of the inverse seesaw framework, with an extra scalar singlet coupling to both the Higgs and the sterile neutrinos, which allows to achieve the correct dark matter abundance in a broader region of the parameter space, in particular in the low mass region for the pseudo-Dirac neutrinos.

with astrophysical p-p sources and Decaying Dark Matter The need of more statistics at low and high energy emphasizes the importance of future Neutrino Telescope (IceCube-2gen and KM3NeT).

Freeze-out scenario for Pseudo-Dirac N • We focus on real phi as dark matter and a Dirac N. But other 7 cases show similar effect on DSNB. Neutrino mass flavor structure • Pseudo-Dirac N. Nucleosynthesis • For masses above ~10 MeV, there is no effect on BBN. • For 1 MeV 10 MeV, the SLIM density is suppressed at the time of nucleosynthesis but its annihilation to neutrinos increases

Pseudo-Dirac dark matter is a viable type of dark matter which originates from a new Dirac fermion whose two Weyl states get slightly split in mass by a small Majorana term. The decay of the heavier to the lighter state naturally occurs over a detectable length scale. Thus, whenever pseudo-Dirac dark matter is produced in a collider, it leaves a clear trace: a visible displaced vertex in

The lightest combination of them provides a viable thermal dark matter if the Higgsino mass scale is close to $ TeV. The small mass splitting induced by singlino turns the neutral components of Higgsinos into pseudo-Dirac fermions which successfully evade the constraints from the direct detection experiments if the singlino mass is $lesssim 10^8$ GeV. We analyse the constraints on …

We study the pseudo-Dirac mixing of left- and right-handed neutrinos in the case where the Majorana masses M L and M R

A bstract. Displaced vertices are relatively unusual signatures for dark matter searches at the LHC. We revisit the model of pseudo-Dirac dark matter (pDDM), which can accommodate the correct relic density, evade direct detection constraints, and generically provide observable collider signatures in the form of displaced vertices.

The Age of the Universe, Dark Matter, and Structure Formation. The Arnold and Mabel Beckman Center of the National Academies of Sciences and Engineering

Relic abundance of dark matter in universal extra dimension models with right‐handed neutrinos Shigeki Matsumoto , Joe Sato , Masato Senami , and Masato Yamanaka Apr 2009

A bstract. We provide a unified presentation of extensions of the Minimal Dark Matter framework in which new fermionic electroweak multiplets are coupled …

LFV and Dirac-ness of massive neutrinos composed of Majorana states Janusz Gluza (Silesia U.) In collaboration with: Tomasz Jelinski, Magdalena Kordiaczynska (Silesia U.)

The Coma Cluster (Abell 1656) is a large cluster of galaxies that contains over 1,000 identified galaxies. Along with the Leo Cluster (Abell 1367), it is one of the two major clusters comprising the Coma Supercluster. It is located in and takes its name from the constellation Coma Berenices.

Comments: 32 pp, 2 figs. Modified to conform to the version accepted by Phys. Rev. D. The last paragraph of Sec. V-A, about Boltzmann brains in Minkowski space, has been significantly enlarged.

Dirac equation Wikipedia

The first KK particle of the right-handed neutrino is a candidate for dark matter in this framework, and its relic abundance is determined by three processes, (1) the decay of the KK photon into the first KK right-handed neutrino in the late universe, (2) production of the first KK right-handed neutrino from the thermal bath in the early universe, and (3) the decay of higher KK right-handed

Michigan: LHC & DM 2009 S. Chang (UC Davis) p. 2 Dark Matter Mystery Dark matter implied by astronomy and cosmology, but mysterious from particle physics view

08/09/2015 TAUP 2015 Torino – Italy Novel gamma-ray features from dark matter cascade processes involving scalar and fermions as intermediate states

Neutrinos can contribute to various episodes of the evolution of the Universe. For instance, in the seesaw model, they may generate the baryon asymmetry of the Universe via leptogenesis. This conference proceedings briefly reviews lepton flavour effects in thermal leptogenesis.

arXiv1004.1567v2 [hep-ph] 12 Feb 2011 length and the

Sp eci c class of textures for the Dirac and Ma jorana mass matrices in the seesa w mo del leading to a pair of almost degenerate neutrinos is discussed. These textures can b e obtained b y imp osing a horizon tal U (1) symmetry. A sp eci c mo del is discussed in whic h: (1) All three neutrino masses are similar in magnitude and could lie around eV pro viding hot comp onen t of the dark matter

is one where dark matter consists of multiple states (i.e., a pseudo-Dirac fermion), split by an amount ∼ > 100 keV, and where the force carrier interacts with SM matter through its mixing with the photon.

A bstract. It is well known that R-symmetric models dramatically alleviate the SUSY flavor and CP problems. We study particular modifications of existing R-symmetric models which share the solution to the above problems, and have interesting consequences for electroweak baryogenesis and the Dark Matter (DM) content of the universe.

We take the dark matter to be a pseudo-Dirac fermion charged under a dark U(1). At high energies, where the U(1) symmetry is unbroken, the dark matter is a charged Dirac fermion; at low energies, a small Majorana mass splits the Dirac fermion into two nearly-degenerate Majorana states ˜ 1 and ˜ 2. Since these states cannot carry conserved charge, their couplings with the U(1) vector boson A

In Fig. 5, we plot, in the m D-m V parameter space, contours of constant ratio of self-interaction cross section to mass of the dark matter, s T / m D, for a pure-Dirac fermion dark matter, and for pseudo-Dirac fermion dark matter case with two mass splittings ? m = 1, 3, 10 MeV.

Abstract. While the bino-dominated lightest neutralino of the minimal supersymmetric standard model (MSSM) is an interesting and widely studied candidate of dark matter, the p-wave suppression of its annihilation cross section requires fine-tuning of the MSSM spectra to be consistent with Wilkinson Microwave Anisotropy Probe (WMAP) observations.

Outline 2 • Thermal Dark Matter is important beyond WIMPs •sub-GeV (i.e. Standard Model scales!) is the next obvious place to seriously explore thermal DM

Self-interacting dark matter without ScienceDirect

Dirac dark matter with a charged mediator a comprehensive

Introduction Introduction Adding sterile fermions to the SM is an economical extension. (motivatied by neutrino masses and mixings, Dark matter, baryon asymmetry of the universe)

Abstract. While the bino-dominated lightest neutralino of the minimal supersymmetric Standard Model (MSSM) is an interesting and widely-studied candidate of the dark matter, the p-wave suppression of its annihilation cross section requires fine-tunings of the MSSM spectra to be consistent with Wilkinson Microwave Anisotropy Probe (WMAP

We perform the first analysis of Dark Matter scenarios in a constrained model with Dirac Gauginos. The model under investigation is the Constrained Minimal Dirac Gaugino Supersymmetric Standard model (CMDGSSM) where the Majorana mass terms of gauginos vanish.

Abstract: Pseudo-Dirac Dark Matter is a viable type of dark matter which originates from a new Dirac fermion whose two Weyl states get slightly split in mass by a small Majorana term.

In cosmology, baryon acoustic oscillations (BAO) are fluctuations in the density of the visible baryonic matter (normal matter) of the universe, caused by acoustic density waves in the primordial plasma of the early universe. In the same way that supernovae provide a “standard candle” for astronomical observations, BAO matter clustering provides a “standard ruler” for length scale in cosmology

Direct Dark Matter Search with XMASS— modulation analysis —ICRR, University of Tokyo K. Kobayashi On behalf of the XMASS collaboration September 8th, 2015

dark matter as ulterior product. One motivation that propitiates this conclusion is the KR-background torsion yields matter/anti-matter asymmetry using in the gauge fields frame, that is to say, using the bosonic KR-torsion from string theory to generate the matter/anti-matter asymmetry in a string model of the Universe. The fact of use these boson fields bring the use of pseudo-scalar fields

Status of Directional Dark Matter Search with Nuclear Emulsion

Pseudo-Majoron as dark matter ScienceDirect

We shall ﬁnd that, since the model predicts a pseudo-Dirac dark matter candidate, we alleviate the tension between ﬁnding the correct dark matter density and the lack of signals for direct detection so far compared to a simple Majorana neutralino.

Abstract. While the bino-dominated lightest neutralino of the minimal supersymmetric Standard Model (MSSM) is an interesting and widely-studied candidate of the dark matter, the p-wave suppression of its annihilation cross section requires fine-tunings of the MSSM spectra to …

22. Dark matter 3 form during the PQ phase transition at T fa. Their decay will give an additional contribution to Ωa, which is often bigger than that in Eq.

We got understanding that about 80% matter in the universe was unknown Matter from observed precise data for universe inrecent year. We know that unknown matter exist in our galaxy. We call this “Dark Matter” and expect to exist as WIMP (Weakly Interacting Massive Particle).

Thequantum V acuum, Dark Energy & Dark Matter Oss.Astron. di Capodimonte 6 September 2012

light active neutrino mass eigenstates, two pairs of (heavy) pseudo-Dirac mass eigenstates and one (mostly) sterile state with mass around the keV, possibly providing a dark matter candidate, and accounting for the recently observed and still unidenti ed monochromatic

Dirac dark matter with a charged mediator: a comprehensive one-loop analysis of the direct detection phenomenology View the table of contents for this issue, or go to the journal homepage for more

ArXiv discussions for 483 institutions including UCT Cosmology, Mullard Space Science Laboratory, AIP, Potsdam, Shanghai Astronomical Observatory, and Yale-Cosmology.

The coupling of the pseudo-Majoron χ to the SM Higgs H not only determines the dark matter relic density but also opens a window for the dark matter detection , , . For example, the Higgs H can mostly decays into the dark matter χ so that the dark matter is possible to find as a missing energy at colliders such as the CERN LHC.

Model-Independent Dark Matter Detection via Kinetic Heating of Neutron Stars TeVPA 2017 08 Aug, Ohio State University Nirmal Raj Notre Dame with

Dark Matter Annihilating into Sterile Neutrino

Pseudo-Dirac dark matter is a viable type of dark matter which originates from a new Dirac fermion whose two Weyl states get slightly split in mass by a small Majorana term.

the Universe is dark matter, with only a small fraction being the ordinary baryonic matter that composes stars, planets and living organisms [22] 5 A dark matter …

In theoretical physics, negative mass is matter whose mass is of opposite sign to the mass of normal matter, e.g. −1 kg. [1] [2] Such matter would violate one or more energy conditions and show some strange properties, stemming from the ambiguity as to whether attraction should refer to force or the oppositely oriented acceleration for negative mass.

Many candidates for Dark Matter axions, gravitinos, WIMPs, etc. exist; however the most popular among them is the WIMP, which can provide the observed relic abundance from a thermal freeze-out mechanism in a large region of parameter space.

dark energy is 75%, and the ratio of dark matter to baryonic matter is 5 to 1. In the zero-energy universe hypothesis, the total amount of energy in the universe is exactly zero.

2 Dark Matter Searches Different approaches needed to discover the exact nature of particle DM Moriond Cosmology 2018 March 17-24, 2018

Joshua Spitz Department of Physics 734-763-2329 450 Church Street spitzj@umich.edu Ann Arbor, MI 48109-1040 Education and Work • University of Michigan at Ann Arbor Ann Arbor, MI

Dark Matter Annihilating into Sterile Neutrino Yi-Lei Tang Center for High Energy Physics, Peking University October 26, 2016 Yi-Lei Tang Dark Matter Annihilating into Sterile Neutrino. Introduction to Seesaw Mechanisms I This slide is based on JHEP 1603 (2016) 043, Yi-Lei Tang, Shou-Hua Zhu, and arXiv:1609.07841. Yi-Lei Tang Dark Matter Annihilating into Sterile Neutrino. Introduction to

Pseudo Dirac Neutrinos in Seesa CERN Document Server

Direct Dark Matter Search with XMASS– modulation

Pseudo-Dirac bino dark matter CORE

Dark matter in the minimal inverse seesaw mechanism

Recent Results on DARK MATTER SEARCHES AT THE LHC

The Accurate Theoretical Calculation of the Percentages of

Pseudo Dirac Neutrinos in Seesa CERN Document Server

In particle physics, the Dirac equation is a relativistic wave equation derived by British physicist Paul Dirac in 1928. In its free form , or including electromagnetic interactions , it describes all spin- 1 / 2 massive particles such as electrons and quarks for which parity is a symmetry .

the Universe is dark matter, with only a small fraction being the ordinary baryonic matter that composes stars, planets and living organisms [22] 5 A dark matter …

In Fig. 5, we plot, in the m D-m V parameter space, contours of constant ratio of self-interaction cross section to mass of the dark matter, s T / m D, for a pure-Dirac fermion dark matter, and for pseudo-Dirac fermion dark matter case with two mass splittings ? m = 1, 3, 10 MeV.

Outline 2 • Thermal Dark Matter is important beyond WIMPs •sub-GeV (i.e. Standard Model scales!) is the next obvious place to seriously explore thermal DM

Abstract. While the bino-dominated lightest neutralino of the minimal supersymmetric Standard Model (MSSM) is an interesting and widely-studied candidate of the dark matter, the p-wave suppression of its annihilation cross section requires fine-tunings of the MSSM spectra to be consistent with Wilkinson Microwave Anisotropy Probe (WMAP

dark energy is 75%, and the ratio of dark matter to baryonic matter is 5 to 1. In the zero-energy universe hypothesis, the total amount of energy in the universe is exactly zero.

Many candidates for Dark Matter axions, gravitinos, WIMPs, etc. exist; however the most popular among them is the WIMP, which can provide the observed relic abundance from a thermal freeze-out mechanism in a large region of parameter space.

Sp eci c class of textures for the Dirac and Ma jorana mass matrices in the seesa w mo del leading to a pair of almost degenerate neutrinos is discussed. These textures can b e obtained b y imp osing a horizon tal U (1) symmetry. A sp eci c mo del is discussed in whic h: (1) All three neutrino masses are similar in magnitude and could lie around eV pro viding hot comp onen t of the dark matter

The Age of the Universe, Dark Matter, and Structure Formation. The Arnold and Mabel Beckman Center of the National Academies of Sciences and Engineering

The Coma Cluster (Abell 1656) is a large cluster of galaxies that contains over 1,000 identified galaxies. Along with the Leo Cluster (Abell 1367), it is one of the two major clusters comprising the Coma Supercluster. It is located in and takes its name from the constellation Coma Berenices.

Joshua Spitz Department of Physics 734-763-2329 450 Church Street spitzj@umich.edu Ann Arbor, MI 48109-1040 Education and Work • University of Michigan at Ann Arbor Ann Arbor, MI

We shall ﬁnd that, since the model predicts a pseudo-Dirac dark matter candidate, we alleviate the tension between ﬁnding the correct dark matter density and the lack of signals for direct detection so far compared to a simple Majorana neutralino.

This causes a mass splitting between Dirac states in the fermion sector and the neutralinos, which provide the dark matter candidate, become pseudo-Dirac states. We discuss two scenarios: the

Pseudo-Dirac dark matter is a viable type of dark matter which originates from a new Dirac fermion whose two Weyl states get slightly split in mass by a small Majorana term. The decay of the heavier to the lighter state naturally occurs over a detectable length scale. Thus, whenever pseudo-Dirac

Paigesays:Comments: 32 pp, 2 figs. Modified to conform to the version accepted by Phys. Rev. D. The last paragraph of Sec. V-A, about Boltzmann brains in Minkowski space, has been significantly enlarged.

Dirac Neutrinos in a Left‐right Model with Mirror Fermions

Self-interacting dark matter without ScienceDirect

Dark Matter Annihilating into Sterile Neutrino