EVALUATION OF Nd:YAG LASER IMPACT ON PARODENTIUM TISSUES

Aim - improving the method of laser therapy in complex treatment of periodontal diseases. Materials and methods. By using methods of light microscopy and morphometry, the dynamics of morphological changes in gum tissues after the traditional open curettage treatment of periodontal pockets by neodymium laser (Nd:YAG, 1064 nm) have been studied. Results. Angenesis was achieved after laser treatment. Conclusion: Morphological picture of gum tissues after complex treatment of periodontal diseases with the use of neodymium laser (Nd:YAG, 1064 nm) conformed to the normal structure of the mucous membrane without distinct signs of inflammation

Measurement of inclusive very forward jet cross sections in proton-lead collisions at \sqrt{sNN} = 5:02 TeV

Measurements of differential cross sections for inclusive very forward jet production in proton-lead collisions as a function of jet energy are presented. The data were collected with the CMS experiment at the LHC in the laboratory pseudorapidity range −6.6 < η < −5.2. Asymmetric beam energies of 4 TeV for protons and 1.58 TeV per nucleon for Pb nuclei were used, corresponding to a center-of-mass energy per nucleon pair of \sqrt{sNN} = 5:02 TeV. Collisions with either the proton (p+Pb) or the ion (Pb+p) traveling towards the negative η hemisphere are studied. The jet cross sections are unfolded to stable-particle level cross sections with p_{T} ≳ 3 GeV, and compared to predictions from various Monte Carlo event generators. In addition, the cross section ratio of p+Pb and Pb+p data is presented. The results are discussed in terms of the saturation of gluon densities at low fractional parton momenta. None of the models under consideration describes all the data over the full jet-energy range and for all beam configurations. Discrepancies between the differential cross sections in data and model predictions of more than two orders of magnitude are observed

Measurement of the Zγ production cross section in pp collisions at 8 TeV and search for anomalous triple gauge boson couplings

Open Access, Copyright CERN, for the benefit of the CMS Collaboration. Article funded by SCOAP3.Abstract: The cross section for the production of Zγ in proton-proton collisions at 8 TeV is measured based on data collected by the CMS experiment at the LHC corresponding to an integrated luminosity of 19.5 fb−1. Events with an oppositely-charged pair of muons or electrons together with an isolated photon are selected. The differential cross section as a function of the photon transverse momentum is measured inclusively and exclusively, where the exclusive selection applies a veto on central jets. The observed cross sections are compatible with the expectations of next-to-next-to-leading-order quantum chromodynamics. Limits on anomalous triple gauge couplings of ZZγ and Zγγ are set that improve on previous experimental results obtained with the charged lepton decay modes of the Z boson

Search for the X(5568) State Decaying into B-s(0)pi(+/-) in Proton-Proton Collisions at root s=8 TeV

A search for resonancelike structures in the B-s(0)pi(+/-) invariant mass spectrum is performed using proton-proton collision data collected by the CMS experiment at the LHC at root s = 8 TeV, corresponding to an integrated luminosity of 19.7 fb(-1). The B-s(0) mesons are reconstructed in the decay chain B-s(0) -> J/Psi phi, with J/Psi -> mu(+) mu(-) and phi -> K+K-. The B-s(0)pi(+/-) invariant mass distribution shows no statistically significant peaks for different selection requirements on the reconstructed B-s(0) and pi(+/-) candidates. Upper limits are set on the relative production rates of the X(5568) and B-s(0) states times the branching fraction of the decay X(5568)(+/-) -> B-s(0)pi(+/-). In addition, upper limits are obtained as a function of the mass and the natural width of possible exotic states decaying into B-s(0)pi(+/-).Peer reviewe

Search for lepton flavour violating decays of a neutral heavy Higgs boson to μτ and eτ in proton-proton collisions at s√ = 13 TeV

A search for lepton flavour violating decays of a neutral non-standard-model Higgs boson in the μτ and eτ decay modes is presented. The search is based on proton-proton collisions at a center of mass energy s√ = 13 TeV collected with the CMS detector in 2016, corresponding to an integrated luminosity of 35.9 fb−1. The τ leptons are reconstructed in the leptonic and hadronic decay modes. No signal is observed in the mass range 200–900 GeV. At 95% confidence level, the observed (expected) upper limits on the production cross section multiplied by the branching fraction vary from 51.9 (57.4) fb to 1.6 (2.1) fb for the μτ and from 94.1 (91.6) fb to 2.3 (2.3) fb for the eτ decay modes

Measurement of prompt ψ(2S) production cross sections in proton–lead and proton–proton collisions at √sNN = 5.02 TeV

Measurements of prompt ψ(2S) meson production cross sections in proton–lead (pPb) and proton–proton (pp) collisions at a nucleon–nucleon center-of-mass energy of √sNN = 5.02 TeV are reported. The results are based on pPb and pp data collected by the CMS experiment at the LHC, corresponding to integrated luminosities of 34.6 nb−1 and 28.0 pb−1, respectively. The nuclear modification factor RpPb is measured for prompt ψ(2S) in the transverse momentum range 4 < pT < 30 GeV/c and the center-of-mass rapidity range −2.4 < yCM < 1.93. The results on ψ(2S) RpPb are compared to the corresponding modification factor for prompt J/ψ mesons. The results point to different nuclear effects at play in the production of the excited charmonium state compared to the ground state, in the region of backward rapidity and for pT < 10 GeV/c

Search for resonant tt¯ production in proton-proton collisions at s√=13 TeV

A search for a heavy resonance decaying into a top quark and antiquark (tt¯) pair is performed using proton-proton collisions at s√=13 TeV. The search uses the data set collected with the CMS detector in 2016, which corresponds to an integrated luminosity of 35.9 fb−1. The analysis considers three exclusive final states and uses reconstruction techniques that are optimized for top quarks with high Lorentz boosts, which requires the use of nonisolated leptons and jet substructure techniques. No significant excess of events relative to the expected yield from standard model processes is observed. Upper limits on the production cross section of heavy resonances decaying to a tt¯ pair are calculated. Limits are derived for a leptophobic topcolor Z′ resonance with widths of 1, 10, and 30%, relative to the mass of the resonance, and exclude masses up to 3.80, 5.25, and 6.65 TeV, respectively. Kaluza-Klein excitations of the gluon in the Randall-Sundrum model are excluded up to 4.55 TeV. To date, these are the most stringent limits on tt¯ resonances

MINERAL'NAYa PLOTNOST' KOSTNOY TKANI U DETEY S DIAGNOZOM DTsP POSLE REKONSTRUKTIVNYKh OPERATsIY NA TAZOBEDRENNOM SUSTAVE

Цель. Оценка состояния минеральной плотности костной ткани (МПКТ) у детей с диагнозом ДЦП после реконструктивных операций на тазобедренном суставе. Материал и методы. В исследовании приняли участие 15 детей с диагнозом ДЦП с оценкой по международной шкале двигательных возможностей GMFCS III-V. Все пациенты находились на восстановительном лечении в детском травматолого-ортопедическом отделении Центра после проведения реконструктивных операций на тазобедренном суставе. Оценивалось физическое развитие: масса и длина тела, индекс массы тела (ИМТ). Для определения МПКТ детям выполнялась двухэнергетическая рентгеновская абсорциометрия поясничного отдела позвоночника L1-L4 позвонков в прямой проекции (Spine AP) и всего тела (Whole body) на аппарате EXСELL XR-46 («Norland», США) с оценкой по Z-критерию, согласно рекомендациям ВОЗ. Результаты. Средний возраст детей 7,4±1,9 лет. Из них 7 девочек и 8 мальчиков. Антропометрические параметры у данной группы пациентов: средняя масса тела 19,8±7,1 кг, средняя длина тела 118,6±14,8 см, средний ИМТ 13,8±2,7, что ниже, чем у здоровых сверстников. В анамнезе у 3 пациентов (20%) наблюдались низкоэнергетические переломы. По результатам двухэнергетической рентгеновской абсорциометрии по программе Whole body у 11 пациентов (73,3%) отмечалось снижение костной массы по сравнению с возрастной нормой (Z-критерий менее -2,0 SD), среднее значение -3,74±0,81. В тоже время, среднее значение Z-критерия МПКТ L1-L4 позвонков находилось в пределах возрастной нормы и составило -0,77±0,641. Заключение. У детей с тяжелой формой церебрального паралича (GMFCS III-V) в восстановительном периоде после реконструктивных операции на тазобедренном суставе наблюдается значительное снижение МПКТ. Это усугубляется длительным периодом иммобилизации после оперативного лечения. Таким образом, необходимо дооперационное определение МПКТ у данной категории пациентов с целью коррекции выявленных нарушений и снижения риска внепозвонковых переломов в послеоперационном периоде