arXiv: High Energy Physics - Phenomenology

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#1Bei ZhouH-Index: 6

#2John F. BeacomH-Index: 79

Neutrino telescopes are powerful probes of high-energy astrophysics and particle physics. Their power is increased when they can isolate different event classes, e.g., by flavor, though that is not the only possibility. Here we focus on a new event class for neutrino telescopes: dimuons, two energetic muons from one neutrino interaction. We make new theoretical and observational contributions. For the theoretical part, we calculate dimuon production cross sections and detection prospects via dee...

Dark matter (DM) detectors employing a Spherical Proportional Counter (SPC) have demonstrated a single-electron detection threshold and are projected to have small background rates. We explore the sensitivity to DM-electron scattering with SPC detectors in the context of DarkSphere, a proposal for a 300 cm diameter fully-electroformed SPC. SPCs can run with different gases, so we investigate the sensitivity for five targets: helium, neon, xenon, methane, and isobutane. We use tools from quantum ...

#1Shao-Feng Ge (SJTU: Shanghai Jiao Tong University)H-Index: 2

#2Pedro Pasquini (SJTU: Shanghai Jiao Tong University)H-Index: 8

We propose a new possibility of using the coherently enhanced neutrino pair emission to probe light mediators between electron and neutrinos. With typical momentum transfer at the atomic \mathcal O(1eV) scale, this process is extremely sensitive for mediator mass range \mathcal O(10^{-3} \sim 10^4 eV. The sensitivity on the product of couplings with electron (g^eor y^e and neutrinos (g^\nuor y^\nu can touch down to |y^e y^\nu| < 10^{-7} - 10^{-18}for a scalar mediator and $|...

#1Cristian Gaidau (UIUC: University of Illinois at Urbana–Champaign)H-Index: 3

#2Jessie Shelton (UIUC: University of Illinois at Urbana–Champaign)H-Index: 33

We re-examine the gravitational capture of dark matter (DM) through long-range interactions. We demonstrate that neglecting the thermal motion of target particles, which is often a good approximation for short-range capture, results in parametrically inaccurate results for long-range capture. When the particle mediating the scattering process has a mass that is small in comparison to the momentum transfer in scattering events, correctly incorporating the thermal motion of target particles result...

#1Yi Chung (UC Davis: University of California, Davis)H-Index: 1

A new heavy Z'vector boson provides a possible explanation for the neutral current B anomalies. Various U(1)'gauge groups have been proposed and studied. In this paper, we explore a new type of U(1)'gauge symmetry inspired by fundamental composite Higgs models with hyperfermions. It is also the first attempt to connect such a Z'boson with a solution to the hierarchy problem. The U(1)'symmetry is identified as the quantum number of the difference between the Standard Model fermion ...

#1Robert LasenbyH-Index: 11

#2Anirudh Prabhu (Stanford University)H-Index: 2

In recent years, a growing experimental program has begun to search for sub-GeV dark matter through its scattering with electrons. An associated theoretical challenge is to compute the dark matter scattering rate in experimental targets, and to find materials with large scattering rates. In this paper we point out that, if dark matter scatters through a mediator that couples to EM charge, then electromagnetic sum rules place limits on the achievable scattering rates. These limits serve as a usef...

#1Tomohiro FujitaH-Index: 25

#2Hiromasa NakatsukaH-Index: 5

Last. Kai MuraiH-Index: 4

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We study SU(N gauge fields that couple to the inflaton through the Chern-Simons term. We provide a general procedure to construct homogeneous, isotropic, and attractor solutions of the gauge fields during inflation. The gauge fields develop various VEVs corresponding to different spontaneous symmetry breaking patterns of SU(N where embedded SU(2 subgroups are broken with the spatial rotation SO(3 symmetry. As specific examples, we construct the stable solutions for N = 3and 4 W...

#1Ian Banta (UCSB: University of California, Santa Barbara)H-Index: 1

#2Timothy Cohen (UO: University of Oregon)H-Index: 30

Last. Dave Sutherland (SISSA: International School for Advanced Studies)H-Index: 1

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We initiate the study of a new class of beyond the Standard Model states that we call "Loryons." They have the defining characteristic of being non-decoupling, in the sense that their physical mass is dominated by a contribution from the vacuum expectation value of the Higgs boson. The stakes are high: the discovery of a Loryon would tell us that electroweak symmetry must be non-linearly realized in the effective field theory of the Standard Model. Loryons have their masses bounded from above by...

#1Tanmay Kumar Poddar (PRL: Physical Research Laboratory)H-Index: 3

The evidence of gravitational wave was first indirectly confirmed by the orbital period loss of Hulse-Taylor binary system which agrees well with the Einstein's general relativistic prediction. The perihelion precession of planets, gravitational light bending and Shapiro time delay are other tests of Einstein's general theory of relativity. However there are small uncertainties in the measurements of those observations from the general relativistic prediction. To account those uncertainties, we ...

Last. B. D. Moreira

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In this paper we investigate the photoproduction of QED bound states in proton -- proton, proton -- nucleus and nucleus -- nucleus collisions at RHIC, LHC and FCC energies considering an accurate treatment of the absorptive corrections and for the nuclear form factor. The total cross sections for the production of singlet and triplet (l^+ l^-)states, with l = e,\, \mu, \, \tau are estimated and a detailed analysis of the photoproduction of singlet QED bound states is performed considering ...

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