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Karlis Dreimanis (Riga Technical University (LV))09/10/2023, 10:45
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Ants Koel (National Institute of Chemical Physics and Biophysics (EE)), Dr Brigita Abakeviciene09/10/2023, 10:50
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Charlotte Lindberg Warakaulle (CERN)09/10/2023, 11:00
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Prof. Tālis Juhna (Riga Technical University)09/10/2023, 11:05
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Dr Mario Kadastik (Member of the Riigikogu)09/10/2023, 11:15
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Ms Rasa Kulvietienė09/10/2023, 11:25
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Ms Silvija Reinberga09/10/2023, 11:35
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Mr Timo Suslov09/10/2023, 11:45
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Kristaps Palskis (Riga Technical University (LV)), Prof. Toms Torims (Riga Technical University (LV))09/10/2023, 11:55
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Ms Alise Pika-Ozola (Industrial Liaison Officer for Latvia), Robert Aare (Estonian Business and Innovation Agency)09/10/2023, 14:00
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Elina Pajuste (University of Latvia (LV)), Rolands Cepuritis (Primekss SIA)09/10/2023, 14:25
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Guntis Pikurs (Riga Technical University (LV))09/10/2023, 14:50
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Anastasiia Chekhovska, Andrey Chesnokov (Institute of Solid State Physics, University of Latvia), Antra Gaile (Riga Technical University (LV)), Benjaminas Togobickij (Lithuanian Energy Institute), Conrado Munoz Diaz (Riga Technical University (LV)), Dace Osite (Riga Technical University (LV)), Dairis Rihards Irbe, Dmitry Bocharov (Institute of Solid State Physics, University of Latvia), Ehsan Moradpur-Tari (Institute of Technology, University of Tartu, Estonia), Kristupa Seskauskaite, Lazar Nikitovic (Riga Technical University (LV)), Luca Piacentini (Riga Technical University (LV)), Mindaugas Ilickas (Kaunas University of Technology), Mindaugas Sarpis (University of Bonn (DE)), Nana Chychkalo (Vilnius University (LT)), Normunds Ralfs Strautnieks (University of Latvia (LV)), Patricija Kalnina (CERN, Institute of Chemical Physics of the University of Latvia), Rudolfs Zabolockis (CERN, Institute of Chemical Physics of the University of Latvia), Viesturs Lacis (Riga Technical University (LV))09/10/2023, 16:20
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Sven Poder (National Institute of Chemical Physics and Biophysics (EE))10/10/2023, 09:00
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Mr Simonas Drauksas (Vilnius University (LT))10/10/2023, 09:24
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Vytautas Dudenas (Vilnius University (LT))10/10/2023, 09:48
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Mindaugas Sarpis (University of Bonn (DE))10/10/2023, 10:12
[additional experimental talk]
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Valts Krumins (University of Latvia (LV))10/10/2023, 11:00
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Andris Potrebko (Riga Technical University (LV))10/10/2023, 11:24
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Aurelijus Rinkevicius (Vilnius University (LT))10/10/2023, 11:48
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Markus Seidel (Riga Technical University (LV))10/10/2023, 12:12
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Uldis Berzins (University of Latvia (LV))10/10/2023, 12:36
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Alise Podelinska (Institute of Solid State Physics, University of Latvia)10/10/2023, 14:20
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Tomas Ceponis (Vilnius University)10/10/2023, 14:44
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Marijus Ambrozas (Vilnius University (LT))10/10/2023, 15:08
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Karlis Dreimanis (Riga Technical University (LV))10/10/2023, 15:32
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Ilaria Brivio (University of Zurich)10/10/2023, 16:20
Over a decade after the discovery of the Higgs boson, the hunt for physics beyond the Standard Model faces the possibility that new particles might be too heavy to be seen at the LHC. In this case, they would only leave small non-resonant traces in the measured distributions, that could be detected in high-precision measurements. The theoretical framework that best describes these effects is...
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Kristaps Palskis (Riga Technical University (LV))11/10/2023, 09:30
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Mr Janis Irbe (Riga Technical University (LV))11/10/2023, 09:54
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Andris Ratkus (Riga Technical University (LV))11/10/2023, 10:40
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Sven Oras (University of Tartu)11/10/2023, 11:04
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Guntis Pikurs (Riga Technical University (LV))11/10/2023, 11:28
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Prof. Veronika Zadin (University of Tartu (EE))11/10/2023, 11:52
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Tobia Romano (Politecnico di Milano, Riga Technical University)11/10/2023, 12:16
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Ants Koel (National Institute of Chemical Physics and Biophysics (EE)), Dr Brigita Abakeviciene11/10/2023, 12:40
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Karlis Dreimanis (Riga Technical University (LV))11/10/2023, 13:05
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Augustinas Stepsys (Vilnius University)
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Sven Põder (National Institute of Chemical Physics and Biophysics (EE))
The Milky Way is an excellent laboratory for studying dark matter as its spatial distribution can be inferred by tracing the dance of luminous celestial bodies. We use the Jeans equation to model the rotational velocities of stars measured by the Gaia satellite to constrain the Galactic circular velocity curve. In particular, we exploit the increase of volume and precision in data brought...
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Kristaps Palskis (Riga Technical University (LV))
Background: With the growing interest of ultra-high dose rate therapy (FLASH-RT) different ionizing particle beams have been considered. With most of the experimental results acquired with electron or photon beams, knowledge on heavier ion use remains sparse.
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Our previous work has developed a model for FLASH effect dose threshold estimation. Our results have suggested that, FLASH-RT could... -
Rudolfs Janis Zabolockis
Scandium radioisotopes can be used to perform diagnostics (positron emission tomography and single-photon emission computer tomography) and therapy on patients (theranostics) due to low toxicity, short half-lives, and stable decay products. 43, 44Sc, and 47Sc can be produced from elements such as Ca, V, and Ti by proton, neutron, and gamma irradiation.
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The CERN-MEDICIS facility uses target... -
Kristaps Palskis (Riga Technical University (LV)), Toms Torims (Riga Technical University)
Background: In the recent years, with the active work of CERN Baltic Group in close collaboration with scientists from Next Ion Medical Machine Study (NIMMS) group of the European Organization for Nuclear Research (CERN), an initiative has been started for an innovative particle therapy center in the Baltic States. To fulfill the initiative, a dedicated working group “Advanced Particle...
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Tomas Ceponis (Vilnius University)
The CERN related activities carried out by the group of Photoelectric Phenomena at Vilnius University will be presented
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Marijus Ambrozas (Vilnius University (LT))
The Compact Muon Solenoid (CMS) experiment is preparing for the Phase-2 upgrade to work with the High-Luminosity LHC. The upgraded CMS detector will feature a completely new tracker system. The CERN/RD53 Collaboration is in charge of developing the readout chip for the upgraded pixel detector (Inner Tracker).
Currently, the 2nd generation prototype chips RD53B CMS (also codenamed CROC_v1)...
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Lazar Nikitovic (Riga Technical University (LV))
In the scope of ongoing initiatives for the design of a new generation of synchrotron-based accelerators for cancer therapy with ion beams, an analysis of LINAC design has started. LINAC represents a critical element with a strong impact on the performance and cost of the accelerator complex. The goal is to identify alternatives at lower cost and a similar or possibly smaller footprint than...
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Dairis Rihards Irbe
Hadron therapy is a form of radiation therapy for cancer treatment. This cancer treatment approach shows multiple advantages to conventional radiotherapy such as higher precision, better effectiveness, minimal healthy tissue damage. Unfortunately, currently hadron therapy is hardly accessible due to complexity and high cost of infrastructure needed to accelerate and direct the beam of heavy...
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Antra Gaile (Riga Technical University (LV))
The Compact Muon Solenoid (CMS) experiment is one of four large experiments at the Large Hadron Collider (LHC) and significant upgrades are planned for all experiments and the accelerator facilities to get ready for the High Luminosity era (HL-LHC). As HL-LHC aims to significantly increase the collision rates, thus providing more data for particle physics experiments, upgrades to handle the...
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Karlis Dreimanis (Riga Technical University (LV))
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Anastasiia Chekhovska
Photonuclear reactions play an essential role in nucleosynthesis taking place in all sites, e.g., stars, novae, and interstellar gas media. Especially important these reactions are for formation of isotopes heavier than iron. The proton-rich $p$-nuclei, such as $^{114}Sn$, and $^{113}In$, can be created only via a complex sequence of radiative processes, involving both emission and capture of...
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Valts Krumins (University of Latvia (LV))
Goal for the AEgIS collaboration is an antihydrogen free-fall measurement which would test one of cornerstones of General Relativity - Weak Equivalence Principle and might give insights about the baryonic asymmetry. The chosen method for this measurement is the moiré deflectometer.
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Optical time-domain ionizing matter wave (OTIMA) interferometry has been established as a powerful tool in the... -
Benjaminas Togobickij (Lithuanian Energy Institute)
One of the few neutron spallation facilities in the world capable of delivering neutron spectra is the neutron time-of-flight facility (n_TOF). These spectra are primarily employed in conducting precise neutron-induced cross-section measurements using the time of flight technique. Since its operation began in 2001, the facility has continuously contributed to a diverse array of scientific...
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Mr Janis Irbe (Riga Technical University (LV))
The significant increase in CERN CMS computing requirements for the upcoming High-Luminosity Large Hadron Collider (HL-LHC) upgrade will initiate new challenges in pledged HPC computing infrastructure. Federated TIER2 deployment architecture is set to provide a scalable solution by utilizing Latvia's National Academic Network and distributed computing resources of several academic institutions...
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Andris Potrebko (Riga Technical University (LV))
Jet energy response depends on the jet flavor. Flavor-dependent (L5) jet energy corrections compensate for this factor while the flavor uncertainties estimate the mismodelling of individual flavors and propagate this to specific flavor mixes. We derive the L5 corrections for CMS run II on a dataset simulated with Pythia 8 and estimate the flavor uncertainties by comparing the Pythia 8 and...
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Ehsan Moradpur-Tari (Institute of Technology, University of Tartu, Estonia)
The effect of high electric fields on the surface of metals can be severe and problematic leading to tip formation and vacuum breakdown. Since these effects relate to electric dipole and polarizability of the surface, they should be studied based on first-principle methods. On the other hand, these methods are computationally demanding and do not scale up to realistic times and dimensions. In...
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Kristupa Šeškauskaitė (Kaunas University of Technology)
Future Circular Collider (FCC-ee) is a proposal for 92 km circumference double ring which would generate 50 MW/beam of synchrotron radiation (SR) power. Design studies call for the SR fan to be intercepted every ~5 m with localised absorbers. Compared to the continuous design (in which the synchrotron radiation absorber (SRA) channel is located all around the beam pipe), this layout is...
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Mindaugas Ilickas (Kaunas University of Technology)
The detection of ultraviolet (UV) photons is becoming increasingly important in high energy particle physics experiments. Sensitivity to UV photons (wavelength range < 350 nm) is essential for detecting Cherenkov radiation in crystals as well as scintillation light in dark matter and neutrino experiments. Nowadays, scientists are looking for new materials for detectors that can directly detect...
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Uldis Berzins (University of Latvia (LV))
Laser Photodetchment Threshold Spectroscopy on
Radioactive Negative Ions
Uldis BērziņšLaboratory of Atomic Physics, Atmospheric Physics and Photochemistry,
Institute of Atomic Physics and Spectroscopy, University of Latvia.Recently, the Laser Photodetachment Threshold Method was adapted for the measurements of radioactive negative ions. GANDALPH (Gothenburg ANion Detector for...
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Ms Alise Pika-Ozola (Industrial Liaison Officer for Latvia)
The primary task of the Industry Liaison Officer (ILO) in Latvia is to ignite the interest and to engage in procurement process a growing number of Latvian companies representing relevant-to-CERN industries. The role of ILO involves awareness-building, matchmaking and support to ensure that Latvian business community and wider society can leverage the opportunities presented by CERN's...
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Mindaugas Sarpis (University of Bonn (DE))
LHCb collaboration is releasing research-quality data to the public for the very first time. A data sample amounting to 960TB was obtained in 2011 and 2012 during the Run I of the Large Hadron Collider. The data is obtained by the LHCb detector when recording the information of proton collisions in the LHC.
The data has undergone a preprocessing step where physics objects, such as the...
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Normunds Ralfs Strautnieks (University of Latvia (LV))
LFU studies has been on the forefront of HEP physics analyses in the recent years, due to the reported tension with SM predictions in LHCb measurements for R(µ/e) ratios. Some of the reported tension has been resolved, but a potential discrepancies could still be found in the R(τ/e) and R(τ/µ) ratios. To investigate these decay ratios, ttbar events have been chosen as a source of leptons for...
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Tobia Romano (Politecnico di Milano, Riga Technical University)
Pure copper is largely used to manufacture particle accelerator components, such as vacuum devices and accelerating cavities, because it combines excellent electrical and thermal conductivity with good workability and solderability. These components often feature complex geometries, like connectors and internal cooling channels, that can only be manufactured following sophisticated routes that...
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Luca Piacentini (Riga Technical University (LV))
This research outlines the recent progresses on the mechanical design and integration of the suspension system of superconducting elements subject to variable loads, with focus on the supports of superconducting dipoles for the rotating transfer line of a carbon ion therapy machine, the so-called gantry.
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When designing suspension systems for superconducting elements subject to constant... -
Guntis Pikurs (Riga Technical University (LV))
Additive manufacturing is a relatively new technology which is changing manufacturing paradigms. It is a more natural way of manufacturing with potential that has not yet been fully discovered in the accelerator community. Furthermore, it is a smarter and greener way of manufacturing where the material and energy are not wasted in extra material removal and chips. Compared to conventional...
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Mr Andrey Chesnokov (Institute of Solid State Physics, University of Latvia), Dmitry Bocharov
Yttrium orthosilicate (Y$_2$Si2O$_5$ or YSO) is one of the scintillator materials that is successfully used in Compact Muon Solenoid (CMS) detectors in the Large Hadron Collider. This material can be chemically modified by substituting yttrium Y$^{3+}$ metal ion(s) with lutetium Lu$^{3+}$ ions, resulting in a range of compositions represented by the formula Lu$_x$Y$_{(1-x)}$SiO$_5$,...
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Vytautas Dudenas (Vilnius University (LT))
Oblique parameters, S, T, and U, are a popular way to parameterize Beyond the Standard Model (BSM) physics contributions to the observables of the electroweak sector. For this parametrization to work, however, one assumes that the BSM model preserves the custodial symmetry, i.e. it must have a tree-level relation $m_W = m_Z \cos{\theta_W}$, just as the Standard model. Inspired by the CDF...
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Conrado Munoz Diaz (Riga Technical University (LV)), Dace Osite (Riga Technical University (LV))
To analyze high-energy collisions that occur in the CMS detector, the particles that come from these collision events need to be identified and reconstructed. This process is done by using the particle-flow (PF) reconstruction algorithm.
The energy response of the CMS detector to particles is non-linear. This effect is particularly prominent for PF hadrons. Hadrons are categorized into...
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Dr Sven Oras (University of Tartu)
Cu electrodes are widely used in accelerators, for example in CLIC [1]. One of the problems arising in such accelerators is the breakdown phenomenon [2] causing damage to the accelerating structures and disturbances in the accelerated beam. The cause of the vacuum breakdowns is still under investigation and the electrodes regularly investigated for clues. One possible explanation for the cause...
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Alise Podelinska (Institute of Solid State Physics, University of Latvia)
This study investigates the radiation response of Chemical Vapor Deposition (CVD) diamond, a crucial detector material at CERN. Utilizing Raman, Fourier Transformation Infrared (FTIR), and Luminescence Spectroscopy, we analyzed both non-irradiated and neutron-irradiated CVD diamond samples. The focus was on comparing spectral characteristics, specifically variations in band positions and...
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Markus Seidel (Riga Technical University (LV))
We present recent results from the CMS Standard Model Physics - Vector boson (SMP-V) group. The heavy vector bosons W and Z are the carriers of the weak nuclear force and their properties are tightly coupled to those of other massive particles, such as the Higgs boson and top quark, via quantum corrections.
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First, we discuss the experimental methods for vector boson measurements, such as the... -
Mr Simonas Draukšas (Vilnius University (LT))
It seems that the literature suggests to go in two opposing directions simultaneously. On the one hand, many papers construct basis-independent quantities, since exactly these quantities appear in the expressions for observables. This means that the mixing angles such as $\tan \beta$ in the Two Higgs Doublet Model must drop out when calculating anything physical. On the other hand, there are...
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Viesturs Lacis (Riga Technical University (LV))
Additive manufacturing has allowed for production of high precision parts with sophisticated geometry and latest advances in technology has enabled production of parts also from pure copper that adds crucial electrical and electromagnetic properties to the produced parts. But main drawback of additive manufacturing is rough surface of produced parts. Effects on surface roughness by surface...
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Andris Ratkus (Riga Technical University (LV))
Riga Technical University Institute of Particle Physics and Accelerator Technology is involved in accelerator projects where our contributions are in accelerator technologies innovation and development as well as in accelerator medical applications. Our team contribute in Innovation Fostering in Accelerator Science and Technology, Heavy Ion Therapy Research and Integration plus and Next Ion...
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Patricija Kalnina (CERN, Institute of Chemical Physics of the University of Latvia)
Certain radionuclides of the chemical element scandium are promising candidates to be used for radionuclide-targeted therapy and positron emission tomography (PET/CT). $^{44}$Sc or $^{43}$Sc can be used for diagnostic imaging purposes and monitoring therapy response and $^{47}$Sc for therapeutic purposes or SPECT diagnostics. In terms of production cross section and cost natural titanium is an...
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Karlis Dreimanis (Riga Technical University (LV))
The Large Hadron Collider (LHC) and its associated experiments, including the Compact Muon Solenoid (CMS), are currently undertaking the Run 3 data collection period, set to end in 2025. This period will be followed by the Long Shutdown 3 (LS3) period (2026-2029), during which the High-Luminosity (HL-LHC) upgrade [1] of the LHC will be installed. In order to cope with the planned increase of...
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Nana Chychkalo (Vilnius University (LT))
The Higgs boson production in association with a top quark-antiquark pair signal was firstly observed in 2018 with a significance of 5.2 standard deviations using proton-proton collisions recorded at center-of-mass energy of 13 TeV by the CMS experiment at the CERN LHC. In the final states containing electrons, muons or tau leptons decaying to hadrons and a neutrino the signal of 4.7 sigma...
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Edgars Mamis (University of Latvia (LV))
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Aurelijus Rinkevicius (Vilnius University (LT))
More than ten years have passed since the discovery of the Higgs boson by the
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ATLAS and CMS Collaborations at the CERN Large Hadron Collider at a mass of
around 125 GeV. Since the discovery more than 30 times more Higgses were
produced, thus enabling a further scrutiny of the Higgs-related processes,
studying different Higgs production modes, its interactions to various bosons
and... -
Prof. Veronika Zadin (University of Tartu (EE))
Many high electric field applications, like as CERN's Compact Linear Collider, are severely hampered by the occurrence of electrical breakdowns. Electrical discharge arises in the presence of a sufficiently high applied electric field, even at ultra high vacuum circumstances, causing disturbances in the device's operating regime, material damage, and, in general, limiting the device's...
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