Charm, Beauty and Top at HERA

Results on open charm and beauty production and on the search for top production in high-energy electron-proton collisions at HERA are reviewed. This includes a discussion of relevant theoretical aspects, a summary of the available measurements and measurement techniques, and their impact on improved understanding of QCD and its parameters, such as parton density functions and charm- and beauty-quark masses. The impact of these results on measurements at the LHC and elsewhere is also addressed.Comment: 103 pages, 60 figures, to be published in Prog. Part. Nucl. Phy

УНІВЕРСИТЕТСЬКІ КЛІНІКИ В РОЗВИТКУ ВИЩОЇ МЕДИЧНОЇ ОСВІТИ

The course of modern Ukrainetowards European integration and higher medical education conformance to international standards determines the relevance of the role of the university clinic in the development of higher medical education. The results of attempts to define the role of the University clinic in the development of national higher medical education, directions of development and optimal model of the University Clinic in current conditions by analyzing existing European and national models of university clinics, and experience of scientific medical complex “University Clinic” of Kharkiv National Medical University work are set forth. The model of the University Clinic, which will facilitate the feasibility of potential of medical university, with numerous clinical departments as coordinator of educational, scientific and treatment activity and international cooperation is proposed.Сучасний курс України на євроінтеграцію та відповідність вищої медичної освіти міжнародним стандартам визначає актуальність питання про роль університетської клініки в розвитку вищої медичної освіти. У статті викладені результати спроби визначити роль університетської клініки в розвитку вітчизняної вищої медичної освіти, напрямки розвитку та оптимальну модель університетської клініки в сучасних вітчизняних умовах на основі аналізу існуючих європейських та вітчизняних моделей університетських клінік та досвіду роботи  Навчально-наукового медичного комплексу «Університетська клініка» Харківського національного медичного університету. Пропонується модель університетської клініки, яка  сприятиме можливості реалізації потенціалу медичного університету, з численними клінічними кафедрами, як координатора навчально-науково-лікувального процесу та міжнародного співробітництва

РОЛЬ СУЧАСНИХ ІНФОРМАЦІЙНИХ ТЕХНОЛОГІЙ У ЗАБЕЗПЕЧЕННІ ЯКОСТІ МЕДИЧНОЇ ОСВІТИ

The aim of the work –  to improve the quality of medical education through the use of modern information technologies. The main body. The article presents the role of modern information technologies in ensuring the quality of medical education. The reform of the health care system requires consistent changes in the training of a modern specialist with an appropriate level of competence, knowledge of the theoretical knowledge and practical skills prepared for market relations in the field of medical services provision. One of the most important prerequisites for ensuring the quality of higher medical education is the introduction of a new level of e-learning or “open learning” in the educational process, which is especially important for the training of a modern specialist. Conclusion. In order to improve the quality of medical education, it is necessary to take into account certain peculiarities of medical e-education, in particular its practical content, standardization of decision-making in the medical and diagnostic direction (protocols of medical aid provision), strengthening of the requirements for acquiring skills of the manager of the medical industry, readiness for work in the labor market and medical services.Мета роботи – з’ясувати вплив інформаційних технологій у трансформації післядипломної медичної освіти. Основна частина. У статті наведено роль сучасних інформаційних технологій у  забезпеченні якості медичної освіти. Реформа системи охорони здоров’я потребує послідовних змін у підготовці сучасного фахівця з належним рівнем компетентностей, володіння теоретичними знаннями та практичними навичками, підготовленого до ринкових відносин у питаннях надання медичних послуг. Однією з важливих передумов забезпечення якості вищої медичної освіти є впровадження в навчальний процес електронної освіти (e-learning) нового рівня або «відкритого навчання», що є особливо важливим для підготовки сучасного фахівця. Висновок. З метою поліпшення якості медичної освіти необхідне урахування певних особливостей медичної електронної освіти, зокрема її практично-орієнтованого змісту, стандартизації прийняття рішень лікувально-діагностичного спрямування (протоколи надання медичної допомоги), посилення вимог до набуття навичок менеджера медичної галузі, готовності до роботи на ринку праці та медичних послуг

Prompt atmospheric neutrino fluxes: perturbative QCD models and nuclear effects

We evaluate the prompt atmospheric neutrino flux at high energies using three different frameworks for calculating the heavy quark production cross section in QCD: NLO perturbative QCD, $k_T$ factorization including low-$x$ resummation, and the dipole model including parton saturation. We use QCD parameters, the value for the charm quark mass and the range for the factorization and renormalization scales that provide the best description of the total charm cross section measured at fixed target experiments, at RHIC and at LHC. Using these parameters we calculate differential cross sections for charm and bottom production and compare with the latest data on forward charm meson production from LHCb at $7$ TeV and at $13$ TeV, finding good agreement with the data. In addition, we investigate the role of nuclear shadowing by including nuclear parton distribution functions (PDF) for the target air nucleus using two different nuclear PDF schemes. Depending on the scheme used, we find the reduction of the flux due to nuclear effects varies from $10\%$ to $50 \%$ at the highest energies. Finally, we compare our results with the IceCube limit on the prompt neutrino flux, which is already providing valuable information about some of the QCD models.Comment: 61 pages, 25 figures, 11 table

Limits on the effective quark radius from inclusive epep scattering at HERA

The high-precision HERA data allows searches up to TeV scales for Beyond the Standard Model contributions to electron-quark scattering. Combined measurements of the inclusive deep inelastic cross sections in neutral and charged current $ep$ scattering corresponding to a luminosity of around 1 fb$^{-1}$ have been used in this analysis. A new approach to the beyond the Standard Model analysis of the inclusive $ep$ data is presented; simultaneous fits of parton distribution functions together with contributions of "new physics" processes were performed. Results are presented considering a finite radius of quarks within the quark form-factor model. The resulting 95% C.L. upper limit on the effective quark radius is $0.43\cdot 10^{-16}$ cm.Comment: 10 pages, 4 figures, accepted by Phys. Lett.

Combined QCD and electroweak analysis of HERA data

A simultaneous fit of parton distribution functions (PDFs) and electroweak parameters to HERA data on deep inelastic scattering is presented. The input data are the neutral current and charged current inclusive cross sections which were previously used in the QCD analysis leading to the HERAPDF2.0 PDFs. In addition, the polarisation of the electron beam was taken into account for the ZEUS data recorded between 2004 and 2007. Results on the vector and axial-vector couplings of the Z boson to u- and d-type quarks, on the value of the electroweak mixing angle and the mass of the W boson are presented. The values obtained for the electroweak parameters are in agreement with Standard Model predictions.Comment: 32 pages, 10 figures, accepted by Phys. Rev. D. Small corrections from proofing process and small change to Fig. 12 and Table

Search for a narrow baryonic state decaying to pKS0{pK^0_S} and pˉKS0{\bar{p}K^0_S} in deep inelastic scattering at HERA

A search for a narrow baryonic state in the $pK^0_S$ and $\bar{p}K^0_S$ system has been performed in $ep$ collisions at HERA with the ZEUS detector using an integrated luminosity of 358 pb$^{-1}$ taken in 2003-2007. The search was performed with deep inelastic scattering events at an $ep$ centre-of-mass energy of 318 GeV for exchanged photon virtuality, $Q^2$, between 20 and 100 $\rm{} GeV^{2}$. Contrary to evidence presented for such a state around 1.52 GeV in a previous ZEUS analysis using a sample of 121 pb$^{-1}$ taken in 1996-2000, no resonance peak was found in the $p(\bar{p})K^0_S$ invariant-mass distribution in the range 1.45-1.7 GeV. Upper limits on the production cross section are set.Comment: 16 pages, 4 figures, accepted by Phys. Lett. B. Minor changes from journal reviewing process, including a small correction to figure

Measurement of the cross-section ratio sigma_{psi(2S)}/sigma_{J/psi(1S)} in deep inelastic exclusive ep scattering at HERA

The exclusive deep inelastic electroproduction of $\psi(2S)$ and $J/\psi(1S)$ at an $ep$ centre-of-mass energy of 317 GeV has been studied with the ZEUS detector at HERA in the kinematic range $2 < Q^2 < 80$ GeV$^2$, $30 < W < 210$ GeV and $|t| < 1$ GeV$^2$, where $Q^2$ is the photon virtuality, $W$ is the photon-proton centre-of-mass energy and $t$ is the squared four-momentum transfer at the proton vertex. The data for $2 < Q^2 < 5$ GeV$^2$ were taken in the HERA I running period and correspond to an integrated luminosity of 114 pb$^{-1}$. The data for $5 < Q^2 < 80$ GeV$^2$ are from both HERA I and HERA II periods and correspond to an integrated luminosity of 468 pb$^{-1}$. The decay modes analysed were $\mu^+\mu^-$ and $J/\psi(1S) \,\pi^+\pi^-$ for the $\psi(2S)$ and $\mu^+\mu^-$ for the $J/\psi(1S)$. The cross-section ratio $\sigma_{\psi(2S)}/\sigma_{J/\psi(1S)}$ has been measured as a function of $Q^2, W$ and $t$. The results are compared to predictions of QCD-inspired models of exclusive vector-meson production.Comment: 24 pages, 8 figure