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arXiv: High Energy Physics - Experiment
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#1Minho KimH-Index: 1
#2Oscar AdrianiH-Index: 25
Last. Hiroaki MenjoH-Index: 12
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Transverse single-spin asymmetries of very forward neutral pions generated in polarized p + pcollisions allow us to understand the production mechanism in terms of perturbative and non-perturbative strong interactions. During 2017 the RHICf Collaboration installed an electromagnetic calorimeter in the zero-degree region of the STAR detector at the Relativistic Heavy Ion Collider (RHIC) and measured neutral pions produced at pseudorapidity larger than 6 in polarized ppcollisions at $\sqr...
#2Roel AaijH-Index: 71
#3C. Abellan BetetaH-Index: 40
Last. Ziad AjaltouniH-Index: 73
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A search for the decays B^0_s\to e^+e^-and B^0\to e^+e^-is performed using data collected with the LHCb experiment in proton-proton collisions at center-of-mass energies of 7 8and 13\,\text{TeV} corresponding to integrated luminosities of 1 2and 2\,\text{fb}^{-1} respectively. No signal is observed. Assuming no contribution from B^0\to e^+e^-decays, an upper limit of \mathcal{B}(B^0_s\to e^+e^-)<9.4\,(11.2)\times10^{-9}is obtained at 90\,(95)\,\%confidence level....
In a recent paper [arXiv:2002.00459], Buttazzo et al. show how the annually modulated rate of the DAMA experiments can be possibly interpreted as an artefact due to the interplay between a time-dependant background and the method to account for it. In this work, we compare this hypothesis against the sinusoidal dark matter signal as proposed by the DAMA collaboration. We produce in a Bayesian approach a quantitative comparison of how much the experimental observations are in support of each hypo...
#1Medina AblikimH-Index: 31
#2M. N. AchasovH-Index: 29
Last. Olga BakinaH-Index: 9
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The cross sections of the process e^{+}e^{-} \to \eta J/\psiat center-of-mass energies (\sqrt{s} between 3.81 and 4.60 GeV are measured with high precision by using data samples collected with the BESIII detector operating at the BEPCII storage ring. Three structures are observed by analyzing the lineshape of the measured cross sections, and a maximum-likelihood fit including three resonances is performed by assuming the lowest lying structure is the \psi(4040) For the other resonances,...
Existence of dark matter indicates the presence of unknown fundamental laws of nature. Ultralight axion-like particles are well-motivated dark matter candidates, emerging naturally from theories of physics at ultrahigh energies. We report the results of a direct search for the electromagnetic interaction of axion-like dark matter in the mass range that spans three decades from 12 peV to 12 neV. The detection scheme is based on a modification of Maxwell's equations in the presence of axion-like d...
The IceCube Neutrino Observatory is capable of performing a unique search for sterile neutrinos through the exploitation of a matter enhanced resonant neutrino oscillation phenomena. As atmospheric muon neutrinos pass the dense material within the Earth, neutral current elastic forward scattering is predicted to induce a transition into a sterile state. This thesis presents two 3+1 sterile neutrino analyses by searching for spectral differences in the reconstructed energy and zenith direction of...
We present new results of measurements of reactor antineutrino flux and spectrum dependence on the distance in the range 6-12 meters from the center of the reactor core. Additional measurements were carried out and set of data to perform statistical analysis was almost doubled since the previous report. Using all collected data we performed the model independent analysis on the oscillation parameters \Delta m^2_{14}and \sin^2(2\theta_{14}) The method of coherent summation of results of mea...
#1Oscar AdrianiH-Index: 25
#2E. Berti (INFN: Istituto Nazionale di Fisica Nucleare)H-Index: 1
Last. Hiroaki MenjoH-Index: 12
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In this paper, we report the measurement of the energy flow, the cross section and the average inelasticity of forward neutrons (+ antineutrons) generated in \mathrm{\sqrt{s} = 13 TeV}proton-proton collisions. These quantities are obtained from the inclusive differential production cross section, measured using the LHCf Arm2 detector at the CERN Large Hadron Collider. The measurements are relative to six pseudorapidity regions: three of them (\eta > 10.75 8.99 10.76 whereas, at lower ps...
#2J. AdamH-Index: 54
#3Leszek AdamczykH-Index: 79
Last. Derek AndersonH-Index: 11
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In this letter, a comprehensive suite of jet substructure measurements via the SoftDrop algorithm, including the shared momentum fraction (z_{\rm{g}} and the groomed jet radius (R_{\rm{g}}, are reported in \pp collisions at \sqrt{s} = 200GeV collected by the STAR experiment. These substructure observables are differentially measured for jets of varying resolution parameters from R = 0.2to R = 0.6and transverse momentum range 15 < p_{\rm{T, jet}} < 60GeV/c These studies show ...
Reactor neutrinos have played a key role in understanding neutrino physics since their discovery. The so-called reactor-anti-neutrino-anomaly RAA, a ~6.5 \%deficit of the mean observed neutrino flux compared to the prediction appeared recently. This anomaly could be interpreted by the existence of a fourth, sterile, neutrino and this hypothesis is currently being tested by the very short baseline experiment STEREO. The latter is installed at very short distance (9 -11m) from the compact core ...
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