bluuebunny/crossref_metadata_2025_split huggingface dataset:
Indirect Dark Matter Searches with IceCube
Authors: Medici Morten 
Published: January 2020

Abstract
I review results from searches for neutrinos from annihilating or decaying dark matter with the IceCube Neutrino Observatory, using data from the fully deployed detector and new event selection algorithms. So far, no signal has been observed and limits have been put on the dark matter lifetime, spin-dependent interaction cross section of dark matter and nucleons, as well as the velocity-averaged dark matter annihilation cross section. We present competitive limits on the annihilation of Galactic halo dark matter with mass between 10 GeV and 300 TeV, which are rather insensitive to the halo density profile. The limits on the spin-dependent scattering cross section from IceCube searches for dark matter annihilations in the Sun set the strongest such bounds for dark matter of mass above 100 GeV. IceCube has searched for halo dark matter decays and set stringent limits on the life time of particles with mass above 10 TeV.
Dynamically constrained model of galactic subhalos and impact on dark matter searches
Authors: Stref M. , Lavalle J. 
Published: January 2020

Abstract
The interaction properties of cold dark matter particles candidates are known to lead to the structuring of dark matter on scales much smaller than typical galaxies. This translates into a large population of dark matter subhalos inside our Galaxy, which impacts the predictions for direct and indirect searches. We present a model for this subhalo population that accounts for the gravitational effects experienced by those structures (tidal stripping and disk shocking) while remaining consistent with dynamical constraints. The subhalos mass density and annihilation profiles are derived. The impact of subhalos on indirect searches with cosmic rays antiprotons is evaluated using the latest data from the AMS-02 experiment.
Direction-sensitive dark matter search with a three-dimensional gaseous tracking detector
Authors: Yakabe Ryota , Miuchi Kentaro , Nakamura Kiseki , Hashimoto Takashi , Ikeda Tomonori , Taishaku Ryosuke , Nakazawa Miki , Ishiura Hirohisa , Tanimori Toru , Kubo Hidetoshi , Takada Atsushi , Sekiya Hiroyuki , Takeda Atsushi 
Published: January 2020

Abstract
NEWAGE is a direction-sensitive direct dark matter search experiment with a three-dimensional gaseous tracking detector (μ-TPC). Our goals are detection of the dark matter - nucleus scattering signal and the investigation of kinematics of the dark matter in the Galaxy. A dark matter search experiment with the NEWAGE-0.3b’ detector was performed from Jul. 2013 to Aug. 2016 (RUN14 to Run17). The total live time is 230.16 days which is about 8 times larger than that of our previous measurement. In the analysis, the event selection was improved and the background was reduced to about 1/3 at 50 keV. This work is important to investigate the properties of the dark matter in the Galaxy in the future dark matter research.
GINGER and GINGERINO
Authors: Virgilio A. D. V. Di , Belfi J. , Bosi F. , Giacomelli U. , Terreni G. , Beverini N. , Carelli C. , Ciampini D. , Ferrante I. , Fuso F. , Maccioni E. , Naletto G. , Ortolan A. , Altucci C. , Velotta L. , Porzio A. 
Published: January 2020

Abstract
GINGER (Gyroscopes IN General Relativity) is a proposal aiming at measuring the Lense-Thirring effect with an Earth based experiment, using an array of ringlasers, which are the most sensitive inertial sensors to measure the rotation rate of the Earth. The long term stability of the apparatus plays a crucial role for this experiment, and an underground location is advantageous from this point of view. GINGERINO is a single axis ring laser located inside the Gran Sasso laboratory. Gingerino has demonstrated that the very high thermal stability of the underground laboratory allows a continuous operation, sensitivity well below fractions of nrad/s, and with a duty cycle above 90% even in free running operation, without stabilisation of the scale factor of the ring laser.
Cosmogenic Activation of Germanium Detectors in EDELWEISS III
Authors: Scorza Silvia 
Published: January 2020

Abstract
Activation of germanium crystals due to cosmic rays becomes a serious limitation for experiments searching for rare events with germanium detectors. Cosmic ray induced activation of the detector components and, even more importantly, of the germanium itself during production, transportation and storage at the Earth’s surface, might result in the production of radioactive isotopes with long half-lives, with a possible impact on the expected background. We present a measurement of the cosmogenic activation in the cryogenic germanium detectors of the EDELWEISS III direct dark matter search experiment. The decay rates measured in detectors with different exposures to cosmic rays above ground are converted into production rates of different isotopes. They are compared to model predictions present in literature and to estimates calculated with the ACTIVIA code.
ZICOS - A new project for neutrinoless double beta decay using Zirconium complex in organic liquid scintillator
Authors: Fukuda Y. , Kamei Y. , Narengerile  , Obata A. , Moriyama S. , Ogawa I. , Gunji T. , Hayami R. , Tsukada S. 
Published: January 2020

Abstract
A liquid scintillator containing 96Zr has been developed for ZICOS experiment. We will use 180 tons of liquid scintillator with 64 % photo coverage of 20 inch photomultiplier. In order to reach the sensitivity [math] ≥ 1027 years, we have to achieve 50 % enrichment of 96 Zr and reduce 95 % of 208Tl decay backgrounds. Using Monte Carlo simulation, we could reduce 93 % of 208Tl background with 78 % efficiency for 0νββ signal using difference of Cherenkov hit pattern. For the separation of Cherenkov and scintillation signals, we measured the timing pulse shape of Zr loaded liquid scintillator using FADC digitizer, and we found an inconsistent pulse shape at the rising time with the template of scintillation. Also the event rate with an inconsistent pulse shape seems to have a directionality.
Interval estimation of bounded parameters
Authors: Lokhov A V , Tkachov F V 
Published: January 2020

Abstract
We consider the construction of interval estimates for the parameters with one-sided constraints. We show that the so-called method of sensitivity limit yields a correct solution of the problem. Derived are the solutions for the cases of a continuous distribution with non-negative estimated parameter and a discrete distribution, specifically a Poisson process with background. For both cases, the best upper limit is constructed that accounts for the a priori information. Particular applications to the neutrino mass measurements, rare processes (neutrinoless double beta-decay etc.) searches and cosmic ray studies are discussed.
The Euclid Near Infrared Spectro-Photometer (NISP) instrument and science
Authors: Mauri N , Dusini S , Fornari F , Ferdinando D Di , Giacomini F , Laudisio F , Patrizii L , Sirignano C , Sirri G , Stanco L , Tenti M , Valenziano L 
Published: January 2020

Abstract
Euclid is an ESA mission designed to understand why the expansion of the Universe is accelerating and what is the nature of the dark energy responsible for this acceleration. By measuring two cosmological probes simultaneously, the Weak Gravitational Lensing and the Galaxy Clustering (BAO and Redshift-Space distorsions), Euclid will constrain dark energy, general relativity, dark matter and the initial conditions of the Universe with unprecedented accuracy. Euclid will be equipped with a 1.2 m diameter SiC mirror telescope feeding 2 instruments: the visible imager and the Near-Infrared Spectro-Photometer. Here the Euclid’s observation probes and main aims are recalled, and the NISP instrument and expected performances are presented.
Design improvements to cables and connectors in the Majorana Demonstrator
Authors: Haufe C R , Reine A L , Abgrall N , Alvis S I , Arnquist I J , Avignone F T , Barabash A S , Barton C J , Bertrand F E , Bode T , Bradley A W , Brudanin V , Busch M , Buuck M , Caldwell T S , Chan Y-D , Christofferson C D , Chu P-H , Cuesta C , Detwiler J A , Dunagan C , Efremenko Yu , Ejiri H , Elliott S R , Gilliss T , Giovanetti G K , Green M P , Gruszko J , Guinn I S , Guiseppe V E , Hehn L , Henning R , Hoppe E W , Howe M A , Keeter K J , Kidd M F , Konovalov S I , Kouzes R T , Lopez A M , Martin R D , Massarczyk R , Meijer S J , Mertens S , Myslik J , O’Shaughnessy C , Othman G , Pettus W , Poon A W P , Radford D C , Rager J , Rielage K , Robertson R G H , Ruof N W , Shanks B , Shirchenko M , Suriano A M , Tedeschi D , Trimble J E , Varner R L , Vasilyev S , Vetter K , Vorren K , White B R , Wilkerson J F , Wiseman C , Xu W , Yakushev E , Yu C-H , Yumatov V , Zhitnikov I , Zhu B X 
Published: January 2020

Abstract
The MAJORANA DEMONSTRATOR is an experiment constructed to search for neutrinoless double-beta decays in germanium-76 and to demonstrate the feasibility to deploy a ton-scale experiment in a phased and modular fashion. It consists of two modular arrays of natural and 76Ge-enriched germanium p-type point contact detectors totaling 44.1 kg, located at the 4850’ level of the Sanford Underground Research Facility in Lead, South Dakota, USA. The DEMONSTRATOR uses custom high voltage cables to bias the detectors, as well as custom signal cables and connectors to read out the charge deposited at each detectors point contact. These low-mass cables and connectors must meet stringent radiopurity requirements while being subjected to thermal and mechanical stress. A number of issues have been identified with the currently installed cables and connectors. An improved set of cables and connectors for the MAJORANA DEMONSTRATOR are being developed with the aim of increasing their overall reliability and connectivity. We will discuss some of the issues encountered with the current cables and connectors as well as our improved designs and their initial performance.
Preliminary Design of Readout Electronics for CDEX-10 in CJPL
Authors: Xue Tao , Zhu Jinfu , Gong Guanghua , Li Jianmin 
Published: January 2020

Abstract
CDEX (China Dark Matter Experiment) is now upgraded to about 10 kg HPGe (High Purity Germanium) detectors and new dedicated readout electronics is in operation. The readout system is interfaced to the front preamplifiers, which have two “slow” outputs with typical 20 μs shaping time and two “fast” output with typical 200 ns shaping time. 8 channels 14-Bit 100 MSPS FADC and 2 channels 12Bit 2000 MSPS FADC are embedded in the readout 6U prototype board. The RAIN1000Z2 readout module based on ZYNQ SoC is used for readout with Gigabit Ethernet.
Dalitz decays of vector mesons in relativistic quark model
Authors: Haurysh V.Yu. , Andreev V. V. 
Published: January 2020

Abstract
In the course of work, basing on the previously developed method for calculating integral representations of decay constants for pseudoscalar and vector mesons in the frame of point form of Poincare-covariant quark model, the research of ω- and ϕ-mesons decays form-factors for Dalitz

V

(

q

Q
¯

)

→
P

(

q

Q
¯

)

ℓ
+

ℓ
−

decays has been carried out. It is shown that the usage of the pseudoscalar density constant with integral representations of decay constants

P

(

q

Q
¯

)

→
ℓ

ν
ℓ

,

V

(

q

Q
¯

)

→

ℓ
+

ℓ
−

and

ℓ
→
P

(

q

Q
¯

)

ν
ℓ

leads to parameters which can be used for the study of

V

(

q

Q
¯

)

→
P

(

q

Q
¯

)

ℓ
+

ℓ
−

decay form-factors. As a result of the work, the behaviour of (t) F

ωπγ* (t) and F

ϕηγ* (t) form-factors compared with the experimental data in the interval q < 0.5 GeV is researched.
Optimized determination of the polarized Bjorken sum rule
Authors: Kotlorz D , Mikhailov S V , Kotlorz A 
Published: January 2020

Abstract
We determine the polarized Bjorken sum rule

Γ
1

p
−
n

in two different ways: phenomenologically, by means of integration of the spin structure function

g
1

p
−
n

within the truncated moment approach and theoretically, with use of the renormalization group for the optimization of the perturbation series. Presented approaches are universal and can be applied to any of the DIS sum rules.
Electromagnetic and gravitomagnetic structure of pions and pion-nucleon scattering
Authors: Selyugin O.V. 
Published: January 2020

Abstract
Taking into account PDFs obtained by various Collaborations, the momentum transfer dependence of GPDs of the pion are obtained. The calculated electromagnetic and gravitomagnetic form factors of the pions and nucleons are used for the description of the pion- nucleon elastic scattering in a wide energy and momentum transfer region with minimum fitting parameters.
NICA absolute Polarimeter
Authors: Kulikov M V , Fimushkin V V , Kuzyakin R A , Prokofichev Yu V , Shumkov A M 
Published: January 2020

Abstract
The development of the absolute Polarimeter APol with an internal polarized atomic hydrogen/deuterium jet target for NICA collider is presented. It is proposed to install the polarimeter into the “warm” gap of the collider ring arc. The polarized jet will cross both accelerated beams. The jet target is based on the classical atomic beam source principle. Expected target thickness of the jet in the interaction regions is 1012 atom/cm2. APol utilizes a reaction of elastic scattering of identical nuclei (protons or deuterons). The polarization of the accelerated beams is determined by use of an actual analyzing power which is measured in turn in scattering of unpolarized accelerated beams on the polarized atomic jet. The polarization of the atomic hydrogen/deuterium jet will be measured by Breit-Rabi polarimeter placed under the collider ring into a jet catcher volume.
Spin structure of exclusive ω muoproduction at COMPASS
Authors: Mariański Bohdan 
Published: January 2020

Abstract
Spin Density Matrix Elements (SDMEs) are determined for exclusive ω meson production on unpolarized protons, in the COMPASS kinematic region of 1.0 (GeV/c)2 < Q
2 < 10.0 (GeV/c)2, 5.0 GeV/c2 < W < 17.0 GeV/c
2 and

0.01

(

GeV
/
c

)

2

<

p
T
2

<
0.5

(

GeV
/
c

)

2

. Using extracted the preliminary SDMEs values the hypothesis of S-Channel Helicity Conservation (SCHC) is studied. Certain matrix elements that correspond to the transition

γ
T
*

→

V
L

(

e
.g
.

r

00

5

)

indicate violation of SCHC in exclusive ω production. A sizable contribution of unnatural parity exchange amplitudes is found for exclusive ω meson muoproduction, and there is a clear indication of its decrease with increasing W. The extracted longitudinal-to-transverse cross section ratio is 0.553 ± 0.044 ± 0.020.
Study of the polarization observables in dp → dp reaction at the deuteron energy of 800 MeV
Authors: Mezhenska O. , Averyanov A.V. , Chernykh E.V. , Enache D. , Gurchin Yu.V. , Isupov A.Yu. , Janek M. , Karachuk J-T , Khrenov A.N. , Krivenkov D.O. , Kurilkin P.K. , Ladygin V.P. , Ladygina N.D. , Livanov A.N. , Piyadin S.M. , Reznikov S.G. , Skhomenko Ya.T. , Terekhin A.A. , Tishevsky A.V. , Uesaka T. , Urban J. 
Published: January 2020

Abstract
The polarization observables are sensitive to the two nucleón (2NF) and three-nucleon structures (3NF) of the nuclei. The aim of the deuteron spin structure (DSS) experiment is to obtain polarization observables in dp elastic scattering at large CMS angles (> 60°) and in dp breakup. Of great importance is the study of polarizations observables in these reactions at intermediate energies because the experimental and theoretical data are very scarce. In this review, results of vector and tensor analyzing powers obtained at JINR Nuclotron at 800 MeV will be presented.
Results of Measurements of the Analyzing Powers for Polarized Neutrons on C, CH2 and Cu Targets for Momenta Between 3 and 4.2 GeV/c
Authors: Sitnik I M , Basilev S N , Bushuev Yu P , Gavrishchuk O P , Glagolev V V , Kirillov D A , Kostayeva N V , Kovalenko A D , Legostaeva K S , Livanov A N , Philippov I A , Piskunov N M , Povtoreiko A A , Rukoyatkin P A , Shindin R A , Shipunov A V , Shutov A V , Slepnev V M , Slepnev I V , Terletskiy A V , Hamilton K , Montgomery R , Annand J R M , Marchand D , Wang Y , Tomasi-Gustafsson E , Perdrisat C F , Punjabi V , Martinska G , Urban J , Musinsky J 
Published: January 2020

Abstract
The analyzing powers for neutron charge exchange nA → pX reactions on nuclei have been measured on C, CH2 and Cu targets at incident neutron momenta 3.0 - 4.2 GeV/c by detecting one charged particle in forward direction. The polarized neutron measurements are the first of their kind. The experiment was performed using the Nuclotron accelerator in JINR Dubna, where polarized neutrons and protons were obtained from breakup of a polarized deuteron beam which has a maximum momentum of 13 GeV/c. The polarimeter ALPOM2 was used to obtain the analyzing power dependence on the transverse momentum of the final-state nucleon. These data have been used to estimate the figure of merit of a proposed experiment at Jefferson Laboratory to measure the recoiling neutron polarization in the quasi-elastic 2
H(e, e′n) reaction, which yields information on the charge and magnetic elastic form factors of the neutron.
On background study for MMT-Drell-Yan process at SPD (NICA) energy
Authors: Skachkova Anna 
Published: January 2020

Abstract
MMT-DY process in case of polarized beams at SPD may allow to measure the full set of leading TMDs and provide an access to GPDs, thus is of great interest to study at NICA. But this process is always accompanied with a huge background. Minimum-bias background, as the most strong one, together with some QCD processes, were simulated by use of PYTHIA6.4 Monte Carlo generator and compared to the signal process at the case of proton-proton beams with Ecm
= 27 GeV. The processes were considered in the two regions of muon pair invariant mass. The set of criteria for background discrimination is proposed. The efficiencies of these criteria are estimated.
Stabilization of small nitrogen clusters via spatial constraint
Authors: Gimaldinova M A , Zemenkov L I , Merinov V A 
Published: January 2020

Abstract
We apply density functional theory to calculate activation barriers for dissociations of small all-nitrogen clusters N4 and N6. The effect of external spatial constraint was also considered. We found that spatial constraint results in significant stabilization of both regarded clusters. So, the spatial constraint can be considered as an efficient method for stabilization of high-energy nitrogen structures.
Lichen cover mapping for caribou ranges in interior Alaska and Yukon
Authors: Macander Matthew J , Palm Eric C , Frost Gerald V , Herriges Jim D , Nelson Peter R , Roland Carl , Russell Kelsey L M , Suitor Mike J , Bentzen Torsten W , Joly Kyle , Goetz Scott J , Hebblewhite Mark 
Published: January 2020

AbstractPrevious research indicates that the effects of climate warming, including shrub expansion and increased fire frequency may lead to declining lichen abundance in arctic tundra and northern alpine areas. Lichens are important forage for caribou (Rangifer tarandus), whose populations are declining throughout most of North America. To clarify how lichen cover might affect caribou resource selection, ecologists require better data on the spatial distribution and abundance of lichen. Here, we use a combination of field data and satellite imagery to model lichen cover for a 583 200 km2area that fully encompasses nine caribou ranges in interior Alaska and Yukon. We aggregated data fromin situvegetation plots, aerial survey polygons and unmanned aerial vehicle (UAV) imagery to align with 30 m resolution Landsat pixels. We used these data to train a random forest model with a suite of environmental and spectral predictors to estimate lichen cover. We validated our lichen cover model using reserved training data and existing external datasets, and found that reserved data from aerial survey polygons (R2 = 0.77) and UAV imagery (R2 = 0.71) provided the best fit. We used our lichen cover map to evaluate the influence of estimated lichen cover on caribou resource selection in the Fortymile Herd from 2012 to 2018 during summer and winter. In both seasons, caribou avoided lichen-poor areas (0%–5% lichen cover) and showed stronger selection as lichen cover increased to ∼30%, above which selection leveled off. Our results suggest that terrestrial lichen cover is an important factor influencing caribou resource selection in northern boreal forests across seasons. Our lichen cover map goes beyond existing maps of lichen abundance and distribution because it incorporates extensive field data for model training and validation and estimates lichen cover over a much larger spatial extent. We expect our landscape-scale map will be useful for understanding trends in lichen abundance and distribution, as well as for caribou research, management and conservation.
Study on A Random Forest Improvement Model in Internet of Vehicles
Authors: Li Yalin , Li Fei , Zhang Jiayan 
Published: January 2020

Abstract
Security model is the main means to protect the information security of automobile network. Among many relevant security models, stochastic forest model is a strong classifier model and can better prevent overfitting than decision tree model. It has good characteristics in resisting flood attacks and other aspects, but it has poor ability to resist Sybil attacks. Therefore, an identity authentication system is added on the basis of the original random forest model, which can resist Sybil attacks while supporting the work in the Internet of vehicles environment. Experimental results show that the model can achieve the described effect.
Research on Identification Algorithm Based on PPG Signal and Improved Convolutional Neural Network
Authors: Wan Dechao , Zhang Luqiao , Bai Yunxiang , Deng Hanghang 
Published: January 2020

Abstract
In this paper, an improved convolutional neural network model is proposed, which is used for the identification of ECG signals while PPG signals are rarely used. The PPG data from the mimic database is denoised by wavelet transform, and then directly sent to the model for automatic sign extraction and recognition. This method can achieve the highest recognition rate of 99.39% on PPG data in mimic database. This makes the identification based on PPG signal meet the requirements of high reliability. With the rapid development of sensors and wearable devices, this research can also meet the universality of one of the requirements of identification.
The Study of an Improved Text Clustering Algorithm for Self-Organizing Maps
Authors: Zhang Baolong , Hou Zemin 
Published: January 2020

Abstract
The traditional SOM algorithm need to determine the number of clustering categories in advance, which is very subjective. In this paper, an improved k-means initial value selection algorithm is proposed to calculate the number of clustering categories, which is applied to SOM network model. In this algorithm, the Latent Semantic Indexing is applied in the pre-processing stage of clustering, and the improved SOM algorithm is applied in the text clustering stage. Namely, the number of clustering categories obtained by the improved k-means initial value selection algorithm is taken as the number of neurons in the output layer of SOM network.