Results 21 to 30 of about 367,039 (268)

The quest for axions and other new light particles [PDF]

Annalen der Physik, 2013
Standard Model extensions often predict low‐mass and very weakly interacting particles, such as the axion. A number of small‐scale experiments at the intensity/precision frontier are actively searching for these elusive particles, complementing searches for physics beyond the Standard Model at colliders.
K. Baker, CANTATORE, GIOVANNI, S. A. Cetin, M. Davenport, K. Desch, B. Döbrich, H. Gies, I. G. Irastorza, J. Jaeckel, A. Lindner, T. Papaevangelou, M. Pivovaroff, G. Raffelt, J. Redondo, A. Ringwald, Y. Semertzidis, A. Siemko, M. Sulc, A. Upadhye, K. Zioutas   +19 more
openaire   +7 more sources

Probing light mediators and (g − 2) μ through detection of coherent elastic neutrino nucleus scattering at COHERENT

Journal of High Energy Physics, 2022
We present the constraints on the parameters of several light boson mediator models obtained from the analysis of the current data of the COHERENT CEνNS experiment. We consider a variety of vector boson mediator models: the so-called universal, the B − L
M. Atzori Corona, M. Cadeddu, N. Cargioli, F. Dordei, C. Giunti, Y. F. Li, E. Picciau, C. A. Ternes, Y. Y. Zhang   +8 more
doaj   +1 more source

Light new particles at the kaon experiments

Journal of Physics: Conference Series, 2023
Abstract Feebly interacting light particles are an attractive addition to the SM because they appear in the broad context of new physics models that address significant issues of the standard model. Searches for the light particles using kaons benefit from their small total decay widths and the availability of enormous datasets. Recently,
openaire   +1 more source

FCNC charmed-hadron decays with invisible singlet particles in light of recent data

Journal of High Energy Physics, 2023
The flavor-changing neutral current (FCNC) decays of charmed hadrons with missing energy (Ɇ) can serve as potentially promising hunting grounds for hints of new physics, as the standard-model backgrounds are very suppressed.
Geng Li, Jusak Tandean
doaj   +1 more source

Decoherence for a heavy particle interacting with a light particle: New analysis and numerics [PDF]

Communications in Mathematical Sciences, 2016
We study the dynamics of a quantum heavy particle undergoing a repulsive interaction with a light one. The main motivation is the detailed description of the loss of coherence induced on a quantum system (in our model, the heavy particle) by the interaction with the environment (the light particle). The content of the paper is analytical and numerical.
Adami, Riccardo, Hauray, Maxime, Negulescu, Claudia   +2 more
openaire   +5 more sources

FCNC B and K meson decays with light bosonic Dark Matter

Journal of High Energy Physics, 2023
We consider decays of B and K mesons into a pseudo-scalar or vector meson plus missing energy. Within the SM, these modes originate from flavor changing neutral current (FCNC) processes with two neutrinos in the final state. In this paper we consider the
Xiao-Gang He, Xiao-Dong Ma, German Valencia   +2 more
doaj   +1 more source

Higgs squared

Journal of High Energy Physics, 2023
We present a novel construction for a Higgs-VEV sensitive (HVS) operator, which can be used as a trigger operator in cosmic selection models for the electroweak hierarchy problem.
Csaba Csáki, Ameen Ismail, Maximilian Ruhdorfer, Joseph Tooby-Smith   +3 more
doaj   +1 more source

Glue to light signal of a new particle

, 2015
Any new particle charged under $SU(3)_C$ and carrying electric charge will leave an imprint in the di-photon invariant mass spectrum as it can mediate $gg \to γγ$ process through loops. The combination of properties of loop functions, threshold resummation and gluon pdfs can result in a peak-like feature in the di-photon invariant mass around twice the
Chway, Dongjin, Dermisek, Radovan, Jung, Tae Hyun, Kim, Hyung Do   +3 more
openaire   +2 more sources

New limits on light scalar and pseudoscalar particles produced in nuclear decay [PDF]

Physical Review D, 1988
We present the results of a search for scalar and pseudoscalar particles produced in nuclear deexcitation. Measurements of the angular correlation of e+e- pairs emitted from excited states of 14N, 16O, and 8Be provided sensitivity to particles with lifetimes 10^-19 < τ < 10^-11 s within the mass range 2me < MX < 5 MeV.
Savage, M. J., Filippone, B. W., Mitchell, L. W.   +2 more
openaire   +3 more sources

Probing an MeV-scale scalar boson in association with a TeV-Scale top-quark partner at the LHC

Journal of High Energy Physics, 2023
Searches for new low-mass matter and mediator particles have actively been pursued at fixed target experiments and at e + e − colliders. It is challenging at the CERN LHC, but they have been searched for in Higgs boson decays and in B meson decays by the
Bhaskar Dutta, Sumit Ghosh, Alfredo Gurrola, Dale Julson, Teruki Kamon, Jason Kumar   +5 more
doaj   +1 more source