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Evidence of Off-Shell Higgs Boson Production From Zz Leptonic Decay Channels and Constraints on Its Total Width With the Atlas Detector
No full textThis Letter reports on a search for off-shell production of the Higgs boson using 139 fb−1 of pp collision data at s= 13 TeV collected by the ATLAS detector at the Large Hadron Collider. The signature is a pair of Z bosons, with contributions from both the production and subsequent decay of a virtual Higgs boson and the interference of that process with other processes. The two observable final states are ZZ→4ℓ and ZZ→2ℓ2ν with ℓ=e or μ. In the ZZ→4ℓ final state, a dense Neural Network is used to enhance analysis sensitivity with respect to matrix element-based discrimination. The background-only hypothesis is rejected with an observed (expected) significance of 3.3 (2.2) standard deviations, representing experimental evidence for off-shell Higgs boson production. Assuming that no new particles enter the production of the virtual Higgs boson, its total width can be deduced from the measurement of its off-shell production cross-section. The measured total width of the Higgs boson is 4.5−2.5+3.3 MeV, and the observed (expected) upper limit on the total width is found to be 10.5 (10.9) MeV at 95% confidence level. © 2023 The Author(s)IN2P3-CNRS; CC-IN2P3; 2014-2021; SCI/013; U.S. Department of Energy, USDOE; Alexander von Humboldt-Stiftung, AvH; Alabama Space Grant Consortium, ASGC; Brookhaven National Laboratory, BNL; CRC Health Group, CRC: 21/SCI/017; Canarie; Karlsruhe Institute of Technology, KIT; H2020 Marie Skłodowska-Curie Actions, MSCA; Multiple Sclerosis Scientific Research Foundation, MSSRF; CERN; Compute Canada; Göran Gustafssons Stiftelser; Natural Sciences and Engineering Research Council of Canada, NSERC; National Research Council Canada, NRC; Canada Foundation for Innovation, CFI; Science and Technology Facilities Council, STFC; Leverhulme Trust; European Research Council, ERC; European Cooperation in Science and Technology, COST; Australian Research Council, ARC; National Stroke Foundation, NSF; Neurosurgical Research Foundation, NRF; Helmholtz-Gemeinschaft, HGF; Minerva Foundation; Deutsche Forschungsgemeinschaft, DFG; Agence Nationale de la Recherche, ANR; Japan Society for the Promotion of Science, KAKEN; Ministry of Education, Culture, Sports, Science and Technology, MEXT; Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung, SNF; Danmarks Grundforskningsfond, DNRF; Fundação de Amparo à Pesquisa do Estado de São Paulo, FAPESP; National Natural Science Foundation of China, NSFC; Ministerstvo Školství, Mládeže a Tělovýchovy, MŠMT; Fundação para a Ciência e a Tecnologia, FCT; Bundesministerium für Bildung und Forschung, BMBF; Chinese Academy of Sciences, CAS; Austrian Science Fund, FWF; Generalitat de Catalunya; Ministry of Science and Technology of the People's Republic of China, MOST; Agencia Nacional de Promoción Científica y Tecnológica, ANPCyT; Nederlandse Organisatie voor Wetenschappelijk Onderzoek, NWO; Bundesministerium für Wissenschaft, Forschung und Wirtschaft, BMWFW; Conselho Nacional de Desenvolvimento Científico e Tecnológico, CNPq; Nella and Leon Benoziyo Center for Neurological Diseases, Weizmann Institute of Science; Israel Science Foundation, ISF; Instituto Nazionale di Fisica Nucleare, INFN; Narodowe Centrum Nauki, NCN; Javna Agencija za Raziskovalno Dejavnost RS, ARRS; Ministarstvo Prosvete, Nauke i Tehnološkog Razvoja, MPNTR; Ministerio de Ciencia e Innovación, MICINN; Centre National pour la Recherche Scientifique et Technique, CNRST; Staatssekretariat für Bildung, Forschung und Innovation, SBFI; Horizon 2020; British Columbia Knowledge Development Fund, BCKDF; European Regional Development Fund, ERDF; Defence Science Institute, DSI; Narodowa Agencja Wymiany Akademickiej, NAWA; Institutul de Fizică Atomică, IFA; Agencia Nacional de Investigación y Desarrollo, ANID; Royal Society of South Australia, RSSA; Irish Rugby Football Union, IRF
Investigating a New Learning Environment for the Migrant Students Through Art and Technology
No full textInSEA World Congress 2023Social integration of migrant students is one of the greatest challenges faced by elementary schools in Turkey often face a number of barriers including a lack of familiarity with the new learning environment. These students may struggle with a sense of isolation, which can negatively impact their academic participation and overall well-being. In order to address this issue, we propose a supportive learning environment that utilizes extended reality (XR) technology to personalize classroom environments for migrant elementary school students. In this study, proposed personalized learning environments are intended to improve the social integration and academic performance of disadvantaged migrant elementary school students. This research will be conducted in two phases. In the first phase, we will collect the data of general art works to determine the cultural backgrounds of the students. Based on the findings of the tendency assessment, we implemented personalized XR experiences in the classroom environments. Then, we observed the students while they are experiencing the new learning environment. We will collect data on the academic performance and social integration of the students using pre- and post-intervention surveys, observations, and interviews. This study assumes that personalized XR experiences will enhance social integration and academic participation of disadvantaged migrant elementary school students. This project has the potential to significantly improve the social integration and academic achievement of these students. The proposed classroom environments with augmented reality foster a sense of belonging and identity among migrant students through virtualized artworks
Atomically Resolved Defects on Thin Molybdenum Carbide (α-Mo2c) Crystals
No full textThintransition metal carbides (TMCs) garnered significant attentionin recent years due to their attractive combination of mechanicaland electrical properties with chemical and thermal stability. Onthe other hand, a complete picture of how defects affect the physicalproperties and application potential of this emerging class of materialsis lacking. Here, we present an atomic-resolution study of defectson thin crystals of molybdenum carbide (; alpha;-Mo2C) grownvia chemical vapor deposition (CVD) by way of conductive atomic forcemicroscopy (C-AFM) measurements under ambient conditions. Defectsare characterized based on the type (enhancement/attenuation) andspatial extent (compact/extended) of the effect they have on the conductivitylandscape of the crystal surfaces. Ab initio calculationsperformed by way of density functional theory (DFT) are employed togather clues about the identity of the defects.Air Force Office of Scientific Research (AFOSR) [FA9550-19-1-0035, FA9550-22-1-0358, FA9550-22-1-0418]This work was supported by the Air Force Office of Scientific Research (AFOSR) Award Nos. FA9550-19-1-0035, FA9550-22-1-0358, and FA9550-22-1-0418
Review of Muon-Proton and Muon-Nucleus Collier Proposals
No full textConstruction of future Muon Collier (or dedicated µ-ring) tangential to the energy frontier hh colliders will give opportunity to realize µp and µA collisions at multi-TeV center-of-mass energies with sufficiently high luminosities. Obviously, such colliders will essentially enlarge the physics search potential of corresponding muon and hadron colliders for both the SM (especially for clarifying QCD basics and confinement hypothesis) and BSM phenomena. In addition, they will provide parton distribution functions for adequate interpretation of energy frontier hh colliders’ and cosmic ray experiments data. This paper is devoted to review of main parameters of µh colliders proposed until now. © World Scientific Publishing Company
Search for Type-Iii Seesaw Heavy Leptons in Leptonic Final States in Pp Collisions at Root S=13 Tev With the Atlas Detector
No full textA 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. The analysis focuses on final states with three or four electrons or muons from the possible decays of new heavy leptons via intermediate electroweak bosons. No significant deviations above the Standard Model expectation are observed; upper and lower limits on the heavy lepton production cross-section and masses are derived respectively. These results are then combined for the first time with the ones already published by ATLAS using the channel with two leptons in the final state. The observed lower limit on the mass of the type-III seesaw heavy leptons combining two, three and four lepton channels together is 910 GeV at the 95% confidence level.ANPCyT, Argentina; YerPhI, Armenia; ARC, Australia; BMWFW, Austria; FWF, Austria; ANAS, Azerbaijan; SSTC, Belarus; FAPESP, Brazil; CNPq, Brazil; NSERC, Canada; NRC, Canada; CFI, Canada; CERN; ANID, Chile; CAS, China; MOST, China; NSFC, China; Minciencias, Colombia; MEYS CR, Czech Republic; DNRF, Denmark; DNSRC, Denmark; IN2P3-CNRS , France; CEA-DRF/IRFU, France; SRNSFG, Georgia; BMBF, Germany; HGF, Germany; MPG, Germany; GSRI, Greece; RGC, China; HongKong SAR, China; ISF, Israel; Benoziyo Center, Israel; INFN, Italy; MEXT , Japan; JSPS, Japan; CNRST, Morocco; NWO, Netherland; RCN, Norway; MEiN, Poland; FCT, Portugal; MNE/IFA, Romania; JINR; MES of Russia; NRC KI; MESTD, Serbia; MSSR, Slovakia; ARRS, Slovenia; MIZS, Slovenia; DSI/NRF, South Africa; MICINN, Spain; SRC, Sweden; Wallenberg Foundation, Sweden; SERI, Switzerland; SNSF, Switzerland; MOST, Taiwan; TAEK, Turkey; STFC, UK; DOE, USA; NSF, USA; BCKDF, Canada; CANARIE, Canada; Compute Canada, Canada; CRC, Canada; COST; ERC; ERDF; Horizon 2020 and Marie Sklodowska-Curie Actions; European Union; Investissements d'Avenir Labex, France; Investissements d'Avenir Idex, France; ANR, France; DFG, Germany; AvH Foundation, Germany; EU-ESF, Greece; Greek NSRF, Greece; BSFNSF, Israel; GIF, Israel; Norwegian Financial Mechanism 2014-2021, Norway; NCN Poland; La Caixa Banking Foundation, Spain; CERCA Programme Generalitat de Catalunya, Spain; Russian Federation; NAWA, Poland; PROMETEO Programme Generalitat Valenciana, Spain; GenT Programme Generalitat Valenciana, Spain; Goran Gustafssons Stiftelse, Sweden; Royal Society, UK; Leverhulme Trust, UKWe thank CERN for the very successful operation of the LHC, as well as the support staff from our institutions without whom ATLAS could not be operated efficiently. We acknowledge the support of ANPCyT, Argentina; YerPhI, Armenia; ARC, Australia; BMWFW and FWF, Austria; ANAS, Azerbaijan; SSTC, Belarus; CNPq and FAPESP, Brazil; NSERC, NRC and CFI, Canada; CERN; ANID, Chile; CAS, MOST and NSFC, China; Minciencias, Colombia; MEYS CR, Czech Republic; DNRF and DNSRC, Denmark; IN2P3-CNRS and CEA-DRF/IRFU, France; SRNSFG, Georgia; BMBF, HGF and MPG, Germany; GSRI, Greece; RGC and HongKong SAR, China; ISF and Benoziyo Center, Israel; INFN, Italy; MEXT and JSPS, Japan; CNRST, Morocco; NWO, Netherlands; RCN, Norway; MEiN, Poland; FCT, Portugal; MNE/IFA, Romania; JINR; MES of Russia and NRC KI, Russian Federation; MESTD, Serbia; MSSR, Slovakia; ARRS and MIZS, Slovenia; DSI/NRF, South Africa; MICINN, Spain; SRC and Wallenberg Foundation, Sweden; SERI, SNSF and Cantons of Bern and Geneva, Switzerland; MOST, Taiwan; TAEK, Turkey; STFC, UK; DOE and NSF, USA. In addition, individual groups and members have received support from BCKDF, CANARIE, Compute Canada and CRC, Canada; COST, ERC, ERDF, Horizon 2020 and Marie Sklodowska-Curie Actions, European Union; Investissements d'Avenir Labex, Investissements d'Avenir Idex and ANR, France; DFG and AvH Foundation, Germany; Herakleitos, Thales and Aristeia programmes co-financed by EU-ESF and the Greek NSRF, Greece; BSFNSF and GIF, Israel; Norwegian Financial Mechanism 2014-2021, Norway; NCN and NAWA, Poland; La Caixa Banking Foundation, CERCA Programme Generalitat de Catalunya and PROMETEO and GenT Programmes Generalitat Valenciana, Spain; Goran Gustafssons Stiftelse, Sweden; The Royal Society and Leverhulme Trust, UK. The crucial computing support from all WLCG partners is acknowledged gratefully, in particular from CERN, the ATLAS Tier-1 facilities at TRIUMF (Canada), NDGF (Denmark, Norway, Sweden), CC-IN2P3 (France), KIT/GridKA (Germany), INFN-CNAF (Italy), NL-T1 (Netherlands), PIC (Spain), ASGC (Taiwan), RAL (UK) and BNL (USA), the Tier-2 facilities worldwide and large non-WLCG resource providers. Major contributors of computing resources are listed in Ref. [77]
İş ve Sosyal Güvenlik Hukukunda Tır Şoförlerine Sefer Başına Yapılan Ödemenin Hukuki Niteliği ve Sonuçları
No full textTır şoförlerine sefer başına yapılan ödemenin hukuki niteliği, iş hukuku ve sosyal güvenlik hukukuyla ilgili haklar ve talepler üzerinde tümüyle zıt sonuçların ortaya çıkmasına yol açmaktadır. Uygulamada ve öğretide iki farklı görüş üzerinden değerlendirmelerin yapıldığı ve bir kabule göre sefer başına ödemenin ücret, diğer kabule göre ise görev yolluğu olarak değerlendirildiği görülmektedir. Ücret olarak kabul edilmesi halinde işçilik alacaklarının hesabına dahil edilirken, görev yolluğu olarak nitelendirildiği takdirde ne işçilik alacaklarının hesabına ne de prime esas kazanca dahil edilebilecektir. Bu bakımdan karma niteliğe sahip olduğu, sefer başına yapılan ödemenin işin görülmesiyle ilişkili masraflara özgülenen kısmının görev yolluğu olduğu, işçiye kalan kısmının ise ücret olarak nitelendirilmesi gerektiği kanaatimizce de isabetli olarak savunulabilir. Ancak karma nitelik görüşüne rağmen yine de uygulamada çözüme kavuşturulması gereken sorunlarla karşılaşılmaktadır. Bu çerçevede öncelikle öğreti görüşleri ve yargı uygulaması üzerinde durulmuş olup, akabinde çözüm önerilerine odaklanılmıştır.The legal nature of the per-trip payment to truck drivers leads to completely opposite consequences on rights and claims related to labor law and social security law. It is seen that evaluations are made based on two different views in practice and teaching, and according to one acceptance, the per-trip payment is considered as wages, and according to the other acceptance, it is considered as duty travel allowances. If it is accepted as a wage, it is included in the account of the labor receivables, if it is considered as a duty travel allowance, it can not be included in the account of the labor receivables or in the earnings subject to premium. In this respect, it can be rightly argued that it has a mixed nature, the part of the per-trip payment, which is allocated to the expenses related to the performance of the job, is the duty travel allowance, and the remaining part to the worker should be qualified as wages. However, despite the mixed nature view, there are still problems that need to be solved in practice. In this framework, first of all, doctrinal views and judicial practice are discussed, and then solution proposals are focused on
Photobiomodulation Combined With Adipose-Derived Stem Cells Encapsulated in Methacrylated Gelatin Hydrogels Enhances in Vivo Bone Regeneration
No full textReconstruction of bone defects is still a significant challenge. The aim of this study was to evaluate the effect of application of photobiomodulation (PBM) to enhance in vivo bone regeneration and osteogenic differentiation potential of adipose-derived stem cells (ADSCs) encapsulated in methacrylated gelatin (GEL-MA) hydrogels. Thirty-six Sprague-Dawley rats were randomly separated into 3 experimental groups (n = 12 each). The groups were control/blank defect (I), GEL-MA hydrogel (II), and ADSC-loaded GEL-MA (GEL-MA+ADSC) hydrogel (III). Biparietal critical sized bone defects (6 mm in size) are created in each animal. Half of the animals from each group (n = 6 each) were randomly selected for PBM application using polychromatic light in the near infrared region, 600-1200 nm. PBM was administered from 10 cm distance cranially in 48 h interval. The calvaria were harvested at the 20th week, and macroscopic, microtomographic, and histologic evaluation were performed for further analysis. Microtomographic evaluation demonstrated the highest result for mineralized matrix formation (MMF) in group III. PBM receiving samples of group III showed mean MMF of 79.93 +/- 3.41%, whereas the non-PBM receiving samples revealed mean MMF of 60.62 +/- 6.34 % (p=0.002). In terms of histologic evaluation of bone defect repair, the higher scores were obtained in the groups II and III when compared to the control group (2.0 for both PBM receiving and non-receiving specimens; p0.001). ADSC-loaded microwave-induced GEL-MA hydrogels and periodic application of photobiomodulation with polychromatic light appear to have beneficial effect on bone regeneration and can stimulate ADSCs for osteogenic differentiation.Hacettepe University Scientific Research FoundationHacettepe University [THD-2017-14465]This work was supported from the Hacettepe University Scientific Research Foundation (Grant No: THD-2017-14465)
Patient and Staff Doses for Various Interventional Radiology and Cardiology Examinations in Turkey
No full textThis study aims to determine the radiation doses of patients and staff during different interventional radiology and cardiology examinations. Dose measurements for interventional radiology examinations were performed in Ibn-i Sina Hospital of Ankara University using Siemens Artis-Zee medical imaging system. Patient dose measurement was carried out for interventional cardiology examinations in Cardiology Department of TOBB-ETU University, Medical Faculty Hospital using Philips Allura Centron interventional X-ray system. Patient doses were obtained in terms of kerma area product (KAP) and cumulative air kerma (CAK) from KAP meter attached to the angiography system. Performance tests of the angiography system were performed before patient dose measurements. Staff dose measurements were carried out with thermoluminescence dosimeters (TLD-100) placed in certain areas on the staff. Patient dose measurements were performed for 15 different interventional radiology examinations on a total of 431 patients and for four different cardiology examinations on a total of 299 patients. Monte Carlo based PCXMC 2.0 program was used to calculate patient effective doses. Lower extremity arteriography was the most common examination with a mean KAP value of 30 Gy cm(2) and mean effective dose value of 1.2 mSv for total number of 194 patients. Mean KAP values calculated for coronary angiography, percutaneous coronary intervention, electrophysiological procedures and radiofrequency cardiac ablation examinations were 62.8, 162.8, 16.7 and 70.6 Gy cm(2), respectively. Radiologist, nurse and technician effective dose normalised to the unit KAP of patient dose were 0.15, 0.11 and 0.14 mu Sv Gy(-1) cm(-2). Similarly, cardiologist, nurse and technician effective dose normalised to the unit KAP of patient dose were 0.22, 0.15 and 0.09 mu Sv Gy(-1) cm(-2). Measured KAP and CAK values vary depending on the type and complexity of the examination. The measured staff doses during cardiac examinations were higher when compared with that measured for interventional radiology as expected
Rational Molecular Design Enables Efficient Blue Tadf-Oleds With Flexible Graphene Substrate
No full textObservation of thermally activated delayed fluorescence (TADF) in conjugated systems redefined the molecular design approach to realize highly efficient organic light emitting diodes (OLEDs) in the early 2010s. Enabling effective reverse intersystem crossing (RISC) by minimizing the difference between singlet and triplet excited state energies (Delta E-ST) is proven to be a widely applicable and fruitful approach, which results in remarkable external quantum efficiencies (EQE). The efficacy of RISC in these systems is mainly dictated by the first-order mixing coefficient (lambda), which is proportional to spin-orbit coupling (H-SO) and inversely proportional to Delta E-ST. While minimizing Delta E-ST has been the focus of the OLED community over the last decade, the effect of H-SO in these systems is largely overlooked. Here, molecular systems with increased H-SO are designed and synthesized by substituting selected heteroatoms of high-performance TADF materials with heavy-atom selenium. A new series of multicolor TADF materials with remarkable EQEs are achieved. One of these materials, SeDF-B, results in pure blue emission with EQEs approaching 20%. Additionally, flexible graphene-based electrodes are developed for OLEDs and revealed to have similar performance as standard indium tin oxide (ITO) in most cases. These devices are the first report of TADF based OLEDs that utilize graphene-based anodes.TUBITAK [115F604, 118C251]P.S. and E.A. contributed equally to this work. This study was supported by TUBITAK under project no. 115F604. E. Y. gratefully acknowledged support from 2232 International Fellowship for Outstanding Researchers Program of TUBITAK (Project No: 118C251). The authors thank Mustafa Yasa for the help in the design of the figures