Hidden Valley searches at CLIC

The sensitivity studies to observe long-lived particles predicted by a set of beyond the Standard Model theoretical models are reported. The analysis is based on a data sample of $e^+e^-$ collisions at sqrt(s) = 3 TeV, simulated with the CLIC_ILD detector model and corresponding to an integrated luminosity of 3 ab-1. Long-lived particle decay products are subsequently combined to reconstruct the parent bosons employing secondary vertices displaced from the beam axis. The upper limits on the production cross section for the long-lived particle lifetimes from 1 to 300 ps, masses between 25 and 50 GeV/c2, and a parent Higgs mass of 126 GeV/c2 are determined.Comment: Talk presented at the International Workshop on Future Linear Colliders (LCWS2018), Arlington, Texas, 22-26 October 2018. C18-10-2

The analysis of suburban housing features based on the example of development investments realised in the vicinity of Krakow

Krakow, as many other developing metropolitan areas, undergoes dynamic suburban processes. Underinvested areas located in direct range of influence of large scale urban centers are becoming a scene of spontaneous city-creating processes. The paper presents results of analyses of new building complexes in the Krakow suburbia. Studies have proved weak spatial relation between particular investments, which may bear witness to an increasing role of network type relation in creating contemporary urban structures. Network type urban relations are not conducive to large-scale social structures in the way public spaces of streets and squares used to be in the traditional urban design. The “new order”, that is being shaped in suburban areas, seems to question some traditional social rules. Therefore the question of relation between these two: social and spatial dimensions of a city became up-to-date. Are new urban structures going to shape a new society, or maybe on the contrary – suburban neoplasm is a result of a contemporary civilization disease

Track Finding with Deep Neural Networks

High Energy Physics experiments require fast and efficient methods toreconstruct the tracks of charged particles. Commonly used algorithms aresequential and the CPU required increases rapidly with a number of tracks.Neural networks can speed up the process due to their capability to modelcomplex non-linear data dependencies and finding all tracks in parallel.In this paper we describe the application of the Deep Neural Networkto the reconstruction of straight tracks in a toy two-dimensional model. It isplanned to apply this method to the experimental data taken by the MUonEexperiment at CERN

Wpływ hałasu drogowego na ptaki

The dynamic development of road infrastructure negatively influences the natural environment and animals using habitats near roads. The main negative effects of this process are primarily: loss and fragmentation of habitats. Another problem is an increase in pollutants and noise intensity in the vicinity of roads. An important problem is negative influence of traffic noise on animals and especially birds. Road noise generate by vehicles disturb vocal communication between birds, mainly in the time of pair formation and early incubation period. Difficulties in communication evoked by noise seem to be one of the main problems in functioning in noisy surroundings. The main functions of birds’ singing are related with territorial defence and mating a partner. Another important effect on birds’ functioning near roads results in the masking of important biological signals due to noise. Masking important signals for territorial defence or partner selection can have as a consequence a negative influence on reproductive success. Species of birds which emit low frequency sounds are particularly exposed to this negative impact. As a results of traffic noise the changes in the volume and frequency of emitted sounds during singing are observed. Some authors pay attention to such factors as local climate or habitat and vegetation structure, because they have an important influence on the propagation of traffic noise. Most of the studies carried out previously concerns the breeding season, and only a few works to describe the impact of noise on birds during migration or wintering. The most frequently reported problem for researchers is to assess the densities of breeding birds near the roadside. The majority of species react with a drop in numbers at roadsides. There are species which are also known to appear with higher density at roadsides. Usually this is related with a richer plant vegetation structure at roadsides and the appearance of the so-called “edge effect”. Some results indicate that bird density at forest peripheries can reach values 40% higher than in the deep forest. An explanation of causes for such a state of matters are the higher numbers of invertebrates found at forest edges. The important factor influencing bird populations breeding at roadsides is also nest predation. Noise and visual disturbance can modifying predator pressure near roads.Szybki rozwój sieci drogowej oraz infrastruktury z nią związanej wywiera silną presję na środowisko oraz żywe organizmy, wykorzystujące siedliska zlokalizowane w pobliżu dróg. Negatywne skutki tego procesu polegają na utracie i fragmentacji siedlisk użytkowanych przez zwierzęta. Osobnym zagadnieniem jest wzrost zanieczyszczeń powietrza i gleby w sąsiedztwie szlaków komunikacyjnych. Ważnym problemem jest oddziaływanie hałasu na zwierzęta egzystujące w pobliżu dróg, w tym szczególnie na ptaki. Hałas generowany przez pojazdy zakłóca komunikację dźwiękową ptaków zwłaszcza w okresie formowania się par i wczesnej inkubacji jaj. Zasadnicze funkcje śpiewu ptaków to sygnalizacja rywalom własnego gatunku zajęcia terytorium oraz co najważniejsze przywabienie partnera. Hałaśliwe „tło” w sąsiedztwie drogi powoduje trudności w porozumiewaniu się osobników. Ogólnie zjawisko zakłócania komunikacji głosowej pomiędzy osobnikami przez hałas drogowy, wywołuje tzw. „maskowanie” ważnych sygnałów biologicznych. Najbardziej wrażliwe na wpływ hałasu drogowego okazują się gatunki wydające dźwięki o niskim paśmie częstotliwości ze względu na skuteczność ich maskowania przez hałas charakteryzujący się podobnym spektrum częstotliwości. W efekcie działania hałasu drogowego powstają zmiany w natężeniu a nawet częstotliwości śpiewu ptaków. Niektórzy autorzy zwracają również uwagę na modyfikujący wpływ czynników klimatycznych oraz struktury i typu siedliska w rozprzestrzenianiu się hałasu. Większość wykonanych dotychczas badań dotyczy okresu lęgowego, a tylko nieliczne prace zajmują się oddziaływaniem hałasu na ptaki w okresie migracji lub w okresie zimowania. Najczęściej podejmowanym zagadnieniem przez badaczy jest ocena zagęszczeń lęgowych ptaków przy drodze. W większości badań zaobserwowano spadek liczebności i bogactwa gatunkowego osobników w sąsiedztwie szlaków komunikacyjnych. Jednak niektóre gatunki ptaków, ze względu na tzw. „efekt krawędzi”, który modyfikuje zasobność bazy pokarmowej oraz mikroklimat, występują w większych zagęszczeniach właśnie przy drogach. Ważnym zagadnieniem jest również modyfikujący wpływ hałasu na drapieżnictwo przy drogach

Czy stosujemy spersonalizowane leczenie raka płuca? Wykorzystanie badań molekularnych w planowaniu wielu linii leczenia u chorego na gruczolakoraka płuca

W wielodyscyplinarnym podejściu do leczenia chorych na raka płuca coraz większą rolę odgrywają terapie ukierunkowane molekularnie, które można zastosować w genetycznie wyselekcjonowanej grupie chorych. Personalizacja leczenia zwiększa liczbę opcji terapeutycznych, wydłuża przeżycie chorych oraz zmniejsza ryzyko wystąpienia efektów ubocznych terapii, mogących zagrażać życiu. W niniejszym opracowaniu przenalizowano proces leczenia 57-letniego mężczyzny chorego na gruczolakoraka płuca, u którego wykryto mutację aktywującą w genie EGFR. Oprócz diagnostycznej segmentektomii oraz paliatywnej hemipelwektomii i radioterapii przerzutu do stawu biodrowego, a także operacji cytoredukcyjnej guza pierwotnego, u chorego zastosowano sześć linii leczenia systemowego opartych zarówno na nowoczesnych terapiach ukierunkowanych molekularnie i immunoterapeutykach, jak i standardowych cytostatykach, co pozwoliło uzyskać trzyletnie przeżycie pacjenta. Niezależnie od dobrego stanu ogólnego i dobrej tolerancji leczenia uporczywość kontynuowania terapii mimo braku dłuższej stabilizacji choroby pozostaje dyskusyjna

Les droits disciplinaires des fonctions publiques : « unification », « harmonisation » ou « distanciation ». A propos de la loi du 26 avril 2016 relative à la déontologie et aux droits et obligations des fonctionnaires

The production of tt‾ , W+bb‾ and W+cc‾ is studied in the forward region of proton–proton collisions collected at a centre-of-mass energy of 8 TeV by the LHCb experiment, corresponding to an integrated luminosity of 1.98±0.02 fb−1 . The W bosons are reconstructed in the decays W→ℓν , where ℓ denotes muon or electron, while the b and c quarks are reconstructed as jets. All measured cross-sections are in agreement with next-to-leading-order Standard Model predictions.The production of $t\overline{t}$, $W+b\overline{b}$ and $W+c\overline{c}$ is studied in the forward region of proton-proton collisions collected at a centre-of-mass energy of 8 TeV by the LHCb experiment, corresponding to an integrated luminosity of 1.98 $\pm$ 0.02 \mbox{fb}^{-1}. The $W$ bosons are reconstructed in the decays $W\rightarrow\ell\nu$, where $\ell$ denotes muon or electron, while the $b$ and $c$ quarks are reconstructed as jets. All measured cross-sections are in agreement with next-to-leading-order Standard Model predictions

Multidifferential study of identified charged hadron distributions in ZZ-tagged jets in proton-proton collisions at s=\sqrt{s}=13 TeV

Jet fragmentation functions are measured for the first time in proton-proton collisions for charged pions, kaons, and protons within jets recoiling against a $Z$ boson. The charged-hadron distributions are studied longitudinally and transversely to the jet direction for jets with transverse momentum 20 $< p_{\textrm{T}} < 100$ GeV and in the pseudorapidity range $2.5 < \eta < 4$. The data sample was collected with the LHCb experiment at a center-of-mass energy of 13 TeV, corresponding to an integrated luminosity of 1.64 fb$^{-1}$. Triple differential distributions as a function of the hadron longitudinal momentum fraction, hadron transverse momentum, and jet transverse momentum are also measured for the first time. This helps constrain transverse-momentum-dependent fragmentation functions. Differences in the shapes and magnitudes of the measured distributions for the different hadron species provide insights into the hadronization process for jets predominantly initiated by light quarks.Comment: All figures and tables, along with machine-readable versions and any supplementary material and additional information, are available at https://cern.ch/lhcbproject/Publications/p/LHCb-PAPER-2022-013.html (LHCb public pages

Study of the B−→Λc+Λˉc−K−B^{-} \to \Lambda_{c}^{+} \bar{\Lambda}_{c}^{-} K^{-} decay

The decay $B^{-} \to \Lambda_{c}^{+} \bar{\Lambda}_{c}^{-} K^{-}$ is studied in proton-proton collisions at a center-of-mass energy of $\sqrt{s}=13$ TeV using data corresponding to an integrated luminosity of 5 $\mathrm{fb}^{-1}$ collected by the LHCb experiment. In the $\Lambda_{c}^+ K^{-}$ system, the $\Xi_{c}(2930)^{0}$ state observed at the BaBar and Belle experiments is resolved into two narrower states, $\Xi_{c}(2923)^{0}$ and $\Xi_{c}(2939)^{0}$, whose masses and widths are measured to be $$m(\Xi_{c}(2923)^{0}) = 2924.5 \pm 0.4 \pm 1.1 \,\mathrm{MeV}, \\ m(\Xi_{c}(2939)^{0}) = 2938.5 \pm 0.9 \pm 2.3 \,\mathrm{MeV}, \\ \Gamma(\Xi_{c}(2923)^{0}) = \phantom{000}4.8 \pm 0.9 \pm 1.5 \,\mathrm{MeV},\\ \Gamma(\Xi_{c}(2939)^{0}) = \phantom{00}11.0 \pm 1.9 \pm 7.5 \,\mathrm{MeV},$$ where the first uncertainties are statistical and the second systematic. The results are consistent with a previous LHCb measurement using a prompt $\Lambda_{c}^{+} K^{-}$ sample. Evidence of a new $\Xi_{c}(2880)^{0}$ state is found with a local significance of $3.8\,\sigma$, whose mass and width are measured to be $2881.8 \pm 3.1 \pm 8.5\,\mathrm{MeV}$ and $12.4 \pm 5.3 \pm 5.8 \,\mathrm{MeV}$, respectively. In addition, evidence of a new decay mode $\Xi_{c}(2790)^{0} \to \Lambda_{c}^{+} K^{-}$ is found with a significance of $3.7\,\sigma$. The relative branching fraction of $B^{-} \to \Lambda_{c}^{+} \bar{\Lambda}_{c}^{-} K^{-}$ with respect to the $B^{-} \to D^{+} D^{-} K^{-}$ decay is measured to be $2.36 \pm 0.11 \pm 0.22 \pm 0.25$, where the first uncertainty is statistical, the second systematic and the third originates from the branching fractions of charm hadron decays.Comment: All figures and tables, along with any supplementary material and additional information, are available at https://cern.ch/lhcbproject/Publications/p/LHCb-PAPER-2022-028.html (LHCb public pages

Measurement of the ratios of branching fractions R(D∗)\mathcal{R}(D^{*}) and R(D0)\mathcal{R}(D^{0})

The ratios of branching fractions $\mathcal{R}(D^{*})\equiv\mathcal{B}(\bar{B}\to D^{*}\tau^{-}\bar{\nu}_{\tau})/\mathcal{B}(\bar{B}\to D^{*}\mu^{-}\bar{\nu}_{\mu})$ and $\mathcal{R}(D^{0})\equiv\mathcal{B}(B^{-}\to D^{0}\tau^{-}\bar{\nu}_{\tau})/\mathcal{B}(B^{-}\to D^{0}\mu^{-}\bar{\nu}_{\mu})$ are measured, assuming isospin symmetry, using a sample of proton-proton collision data corresponding to 3.0 fb${ }^{-1}$ of integrated luminosity recorded by the LHCb experiment during 2011 and 2012. The tau lepton is identified in the decay mode $\tau^{-}\to\mu^{-}\nu_{\tau}\bar{\nu}_{\mu}$. The measured values are $\mathcal{R}(D^{*})=0.281\pm0.018\pm0.024$ and $\mathcal{R}(D^{0})=0.441\pm0.060\pm0.066$, where the first uncertainty is statistical and the second is systematic. The correlation between these measurements is $\rho=-0.43$. Results are consistent with the current average of these quantities and are at a combined 1.9 standard deviations from the predictions based on lepton flavor universality in the Standard Model.Comment: All figures and tables, along with any supplementary material and additional information, are available at https://cern.ch/lhcbproject/Publications/p/LHCb-PAPER-2022-039.html (LHCb public pages