Preprints

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2022-03-28
17:32
arXiv [GSI-2022-00495] Preprint
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Science Requirements and Detector Concepts for the Electron-Ion Collider: EIC Yellow Report
[BNL-220990-2021-FORE; JLAB-PHY-21-3198; LA-UR-21-20953; arXiv:2103.05419]

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2022-02-18
12:19

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2022-02-18
09:16
arXiv [GSI-2022-00382] Preprint
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Feasibility and physics potential of detecting $^8$B solar neutrinos at JUNO
[arXiv:2006.11760]
The Jiangmen Underground Neutrino Observatory~(JUNO) features a 20~kt multi-purpose underground liquid scintillator sphere as its main detector. Some of JUNO's features make it an excellent experiment for $^8$B solar neutrino measurements, such as its low-energy threshold, its high energy resolution compared to water Cherenkov detectors, and its much large target mass compared to previous liquid scintillator detectors. [...]

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2022-02-16
16:19
arXiv [GSI-2022-00363] Preprint
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Search for Low-Energy Signals from Fast Radio Bursts with the Borexino Detector
[arXiv:2111.14500]
The search for neutrino events in correla-tion with several of the most intense fast radio bursts(FRBs) has been performed using the Borexino data.We have searched for signals with visible energies above250 keV within a time window of ±1000 s correspond-ing to the detection time of a particular FRB. Wealso applied an alternative approach based on search-ing for specific shapes of neutrino-electron scatteringspectra in the full exposure spectrum of the Borexinodetector. [...]

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2022-02-16
15:54
arXiv [GSI-2022-00361] Preprint
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Spin Physics at COSY (2021-2024 and beyond) -- Pathfinder investigations toward an EDM storage ring and Spin-for-FAIR
[arXiv:2108.13933]
The unique global feature of COSY is its ability to accelerate, store and manipulate polarized proton and deuteron beams. In the recent past, these beams have been used primarily for precision measurements, in particular in connection with the study of charged particle EDMs (Electric Dipole Moment) in storage rings. [...]

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2022-02-16
15:00
arXiv [GSI-2022-00353] Preprint
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Damping signatures at JUNO, a medium-baseline reactor neutrino oscillation experiment
[arXiv:2112.14450]
We study damping signatures at the Jiangmen Underground Neutrino Observatory(JUNO), a medium-baseline reactor neutrino oscillation experiment. These damping signaturesare motivated by various new physics models, including quantum decoherence, 𝜈3 decay, neutrinoabsorption, and wave packet decoherence. [...]

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2022-02-16
08:54
arXiv [GSI-2022-00352] Preprint
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Performance study and calibration strategy of the HADES scintillator TOF Wall with fast digital readout
[arXiv:2103.07416]
We present in this work the calibration procedure and a performance study of long scintillator bars used for the time-of-flight (TOF) measurement in the HADES experiment. The digital front-end electronics installed at the TOF detector required to develop novel calibration methods. [...]

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2022-01-20
15:22
arXiv [GSI-2022-00183] Preprint
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Search for the decay $h_c\rightarrow\pi^0J/\psi$
A search for the decay $h_c\rightarrow\pi^0J/\psi$ is performed using a sample of $h_c$ produced in the reaction $e^+e^-\rightarrow\pi^+\pi^-h_c$. The data samples were collected with the BESIII detector at center-of-mass energies between 4.189 and 4.437 GeV, corresponding to a total integrated luminosity of 11 fb$^{-1}$. [...]

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2022-01-20
14:27
arXiv [GSI-2022-00178] Preprint
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Study of light scalar mesons through $D_s^+ \to \pi^0 \pi^0 e^+ \nu_e$ and $K_S^0 K_S^0 e^+ \nu_e$ decays
Using 6.32~fb$^{-1}$ of $e^+e^-$ collision data recorded by the BESIII detector at center-of-mass energies between $4.178$ to $4.226$~GeV, we present the first measurement of the decay $D_s^+\to f_0(980)e^+\nu_e,\,f_0(980)\to \pi^0\pi^0$. The product branching fraction of $D_s^+\to f_0(980)e^+\nu_e,\,f_0(980)\to \pi^0\pi^0$ is measured to be $(7.9\pm1.4_{\rm stat} \pm0.3_{\rm syst})\times 10^{-4}$, with a statistical significance of $7.8\sigma$. [...]

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2022-01-20
14:24
arXiv [GSI-2022-00177] Preprint
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Observation of the Doubly Cabibbo-Suppressed Decays $D^+\to K^+\pi^0\pi^0$ and $D^+\to K^+\pi^0\eta$
[BAM-00461]
By analyzing $e^+e^-$ annihilation data corresponding to an integrated luminosity of $2.93\,\rm fb^{-1}$ collected at the center-of-mass energy of 3.773\,GeV with the BESIII detector, we report the first observations of the doubly Cabibbo-suppressed decays $D^+\to K^+\pi^0\pi^0$ and $D^+\to K^+\pi^0\eta$. The branching fractions of $D^+\to K^+\pi^0\pi^0$ and $D^+\to K^+\pi^0\eta$ are measured to be $(2.1 \pm 0.4_{\rm stat} \pm 0.1_{\rm syst})\times 10^{-4}$ and $(2.1 \pm 0.6_{\rm stat} \pm 0.1_{\rm syst})\times 10^{-4}$ with statistical significances of 8.0$\sigma$ and 5.0$\sigma$, respectively. [...]

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