Preprints

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2020-09-10
09:21
OpenAccess [PUBDB-2020-03345] Preprint
et al
EeV Astrophysical neutrinos from FSRQs?
[arXiv:2003.08701]
10 pp. () [10.3204/PUBDB-2020-03345]  GO
Flat Spectrum Radio Quasars (FSRQ) are the most powerful blazars in the gamma-ray band. Although they are supposed to be good candidates in producing high energy neutrinos, no secure detection of FSRQs has been obtained up to now, except for a possible case of PKS B1424-418. [...]
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2020-09-10
09:17
OpenAccess [PUBDB-2020-03344] Preprint
et al
Blazar origin of the UHECRs and perspectives for the detection of astrophysical source neutrinos at EeV energies
[arXiv:2003.08392]
10 pp. () [10.3204/PUBDB-2020-03344]  GO
We demonstrate that a population of blazars can describe the observed spectrum and composition of Ultra-High-Energy Cosmic Rays (UHECRs), and that the dominant contribution comes from low-luminosity BL Lacs. However, a sub-dominant contribution from high-luminosity blazars can lead to a substantial neutrino flux which will peak at EeV energies. [...]
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2020-09-10
09:14
OpenAccess [PUBDB-2020-03343] Preprint
et al
White Paper: ARIANNA-200 high energy neutrino telescope
[arXiv:2004.09841]
12 pp. () [10.3204/PUBDB-2020-03343]  GO
The proposed ARIANNA-200 neutrino detector, located at sea-level on the Ross Ice Shelf, Antarctica, consists of 200 autonomous and independent detector stations separated by 1 kilometer in a uniform triangular mesh, and serves as a pathfinder mission for the future IceCube-Gen2 project. The primary science mission of ARIANNA-200 is to search for sources of neutrinos with energies greater than 10^17 eV, complementing the reach of IceCube. [...]
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2020-09-10
09:07
OpenAccess [PUBDB-2020-03342] Preprint

A concordance scenario for the observation of a neutrino from the Tidal Disruption Event AT2019dsg
[arXiv:2005.06097]
6 pp. () [10.3204/PUBDB-2020-03342]  GO
We introduce a phenomenological concordance scenario with a relativistic jet for the Tidal Disruption Event (TDE) AT2019dsg, which has been proposed as source of the astrophysical neutrino event IceCube-191001A. Noting that AT2019dsg is one of the brightest (and few) TDEs observed in X-rays, we connect the neutrino production with the X-rays: an expanding cocoon causes the progressive obscuration of the X-rays emitted by the accretion disk, while at the same time it provides a sufficiently intense external target of back-scattered X-rays for photo-pion production off protons. [...]
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2020-09-10
09:04
OpenAccess [PUBDB-2020-03341] Preprint
et al
Modelling the spread of Covid19 in Italy using a revised version of the SIR model
[arXiv:2005.08724]
11 pp. () [10.3204/PUBDB-2020-03341]  GO
In this paper, we present a model to predict the spread of the Covid-19 epidemic and apply it to the specific case of Italy. We started from a simple Susceptible, Infected, Recovered (SIR) model and we added the condition that, after a certain time, the basic reproduction number $R_0$ exponentially decays in time, as empirically suggested by world data. [...]
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2020-09-10
09:01
OpenAccess [PUBDB-2020-03340] Preprint
et al
Systematic parameter space study for the UHECR originfrom GRBs in models with multiple internal shocks
[arXiv:2006.14301]
16 pp. () [10.3204/PUBDB-2020-03340]  GO
We scrutinize the paradigm that conventional long-duration Gamma-Ray Bursts (GRBs) are the dominant source of the ultra-high energy cosmic rays (UHECRs) within the internal shock scenario by describing UHECR spectrum and composition and by studying the predicted (source and cosmogenic) neutrino fluxes. Since it has been demonstrated that the stacking searches for astrophysical GRB neutrinos strongly constrain the parameter space in single-zone models, we focus on the dynamics of multiple collisions for which different messengers are expected to come from different regions of the same object. [...]
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2020-09-09
11:53
OpenAccess [PUBDB-2020-03322] Preprint
et al
Performance of the missing transverse momentum triggers for the ATLAS detector during Run-2 data taking
[CERN-EP-2020-050; arXiv:2005.09554]
 GO
The factor of four increase in the LHC luminosity, from 0.5 × 10$^{34}$ cm$^{−2}$s$^{−1}$ to 2.0 × 10$^{34}$cm$^{−2}$s$^{−1}$, and the corresponding increase in pile-up collisions during the 2015–2018 data-taking period, presented a challenge for the ATLAS trigger, particularly for those algorithms that select events with missing transverse momentum. The output data rate at fixed threshold typically increases exponentially with the number of pile-up collisions, so the legacy algorithms from previous LHC data-taking periods had to be tuned and new approaches developed to maintain the high trigger efficiency achieved in earlier operations [...]
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2020-09-09
11:21
OpenAccess [PUBDB-2020-03315] Preprint
et al
Search for type-III seesaw heavy leptons in dilepton final states in $pp$ collisions at $\sqrt{s}$ = 13 TeV with the ATLAS detector
[CERN-EP-2020-130; arXiv:2008.07949]
 GO
A search for the pair production of heavy leptons as predicted by the type-III seesaw mechanism is presented. The search uses proton-proton collision data at a centre-of-mass energy of 13 TeV, corresponding to 139 fb$^{-1}$ of integrated luminosity recorded by the ATLAS detector during Run 2 of the Large Hadron Collider. [...]
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2020-09-01
14:43
OpenAccess [PUBDB-2020-03181] Preprint
et al
Search for a doubly-charged $DDK$ bound state in $\Upsilon(1S,2S)$ inclusive decays and via direct production in $e^+e^-$ collisions at $\sqrt{s}$ = 10.520, 10.580, and 10.867 GeV
[Belle Preprint # 2020-10; KEK Preprint # 2020-11; arXiv:2008.13341]
 GO
We report the results of a first search for a doubly-charged $DDK$ bound state, denoted the $R^{++}$, in $\Upsilon(1S)$ and $\Upsilon(2S)$ inclusive decays and via direct production in $e^+e^-$ collisions at $\sqrt{s}$ = 10.520, 10.580, and 10.867 GeV. The search uses data accumulated with the Belle detector at the KEKB asymmetric-energy $e^+e^-$ collider. [...]
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2020-09-01
14:43
OpenAccess [PUBDB-2020-03180] Preprint

Renormalization Group Equations of Higgs-$R^2$ Inflation
[DESY-20-130; arXiv:2008.01096]
 GO
We derive one- and two-loop renormalization group equations (RGEs) of Higgs-$R^2$ inflation. This model has a non-minimal coupling between the Higgs and the Ricci scalar and a Ricci scalar squared term on top of the standard model. [...]
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