Senka Đurić

Object detection is one of the key software components in the next generation of autonomous cars. Classical computer vision and machine learning approaches for object detection usually suffer from the slow response time. Modern algorithms and architectures based on artificial neural networks, such as YOLO (You Only Look Once) algorithm, solve this problem without precision losses. In this paper we provide the demonstration of the usage of the newest YOLOv3 algorithm for the detection of traffic participants. We have trained the network for 5 object classes (car, truck, pedestrian, traffic signs, and lights) and have demonstrated the effectiveness of the approach in the variety of the driving conditions (bright and overcast sky, snow, fog, and night).

This document summarises the talks and discussions happened during the VBSCan Split17 workshop, the first general meeting of the VBSCan COST Action network. This collaboration is aiming at a consistent and coordinated study of vector-boson scattering from the phenomenological and experimental point of view, for the best exploitation of the data that will be delivered by existing and future particle colliders.

The resent multiboson measurements from CMS are interpreted in terms of constraints on anomalous triple and quartic gauge couplings. Presented at EPS-HEP 2015 European Physical Society Conference on High Energy Physics 2015 CMS LHC Run 1 Multiboson Interactions Review Senka Duric∗ (on behalf of CMS collaboration) University of Wisconsin-Madison E-mail: senka.duric@cern.ch We present the multiboson interaction measurements performed by the CMS collaboration using Run 1 data taking period at LHC. Anomalous triple and quartic gauge couplings are measured in diboson and triboson production channels at the center-of-mass energy of 7 and 8 TeV. Resulting limits on anomalous neutral triple and anomalous quartic gauge couplings are the best world limits, while limits on anomalous charged triple gauge couplings are competitive with results from LEP experiments. The European Physical Society Conference on High Energy Physics 22–29 July 2015 Vienna, Austria

The CMS Collaboration presents the first measurement of the differential cross section of jets from charm quarks produced in proton-lead (pPb) collisions at a nucleon-nucleon center-of-mass energy of sqrt(s[NN]) = 5.02 TeV, as well as results from charm quark jets in proton-proton (pp) collisions at sqrt(s) = 2.76 and 5.02 TeV. By comparing the yields of the pPb and pp collision systems at the same energy, a nuclear modification factor for charm jets from 55 to 400 GeV/c in pPb collisions at sqrt(s[NN]) = 5.02 TeV of R[pA] = 0.92 +/- 0.07 (stat) +/- 0.11 (syst) is obtained. This is consistent with an absence of final-state energy loss for charm quarks in pPb collisions. In addition, the fraction of jets coming from charm quarks is found to be consistent with that predicted by PYTHIA 6 for pp collisions at sqrt(s)= 2.76 and 5.02 TeV, and is independent of the jet transverse momentum from 55 to 400 GeV/c.

Measurements of diboson processes in proton-proton collisions at √s = 7TeV and 8TeV with the CMS experiment at the LHC are summarized. Inclusive cross section measurements are performed in the leptonic decay modes ZZ → 2l2l', Wγ → lνγ, Zγ → llγ, Zγ → ννγ, W+W− → lνlν, and the semileptonic decay mode WW + WZ → lνjj, where l = e, μ and l' = e, μ, τ . Cross section for ZZ (W+W−) production is measured at √s = 7TeV and 8TeV using data corresponding to an integrated luminosity of 5.0 fb−1 (4.9 fb−1) and 5.3 fb−1 (3.5 fb−1√ ), respectively. Production of Wγ, Zγ, Zγ, and WW+WZ are measured at √s = 7TeV using data of 5.0 fb−1. A search for exclusive or quasi-exclusive W+W− production by two-photon exchange in the leptonic decay mode WW → eνμν, at √s = 7TeV is performed using data of 5.0 fb−1. All measured cross sections are in agreement with NLO expectations. Inclusive diboson channels are used to extract upper limits on anomalous WWγ, WWZ, ZZγ, Zγγ, ZZZ trilinear gauge couplings. Limits on charged couplings are competitive to limits provided by previous experiments while neutral couplings limits are few times more precise. Exclusive W+W− channel is used to extract the limits on anomalous γγWW quartic gauge coupling, set at the LHC for the first time and resulting in the sensitivity two orders of magnitude better then limits provided by LEP experiments.

Na CERN-u su u toku zadnje pripreme za pustanje u pogon LHCa. Na tom sudarivacu ce se proucavati sudari protona na energiji centra mase od 14 TeV. Eksperimentalni program LHC obuhvaca siroki spektar otvorenih pitanja u fizici elementarnih cestica: porijeklo masa bozona i fermiona, potraga za kandidatima tamne tvari, kvarkgluonska plazma, simetrija materija-antimaterija, itd. Visegodisnja faza razvoja i izgradnje LHC detektora zavrsila je 2008. godine i 4 velika detektora ALICE, ATLAS, CMS i LHCb su danas spremna za snimanje prvih sudara. U protekloj godini su LHC detektori snimili vecu kolicinu kozmickih zraka, pomocu kojih su se mogle testirati performanse raznih podsustava detektora i sustava prikupljanja podataka, kao i razne metode kalibracije detektora. Također su se proucile karakteristike spektra kozmickih miona. Na jesen 2009. se ocekuju prva mjerenja proton-proton sudara. Predavanje ce se uz navedeno osvrnuti i na mjerenja koja se ocekuju u ranoj fazi LHC-a, od provjera standardnog modela do prvih potraga za novom fizikom.

This document summarises the talks and discussions happened during the VBSCan Split17 workshop, the first general meeting of the VBSCan COST Action network. This collaboration is aiming at a consistent and coordinated study of vector-boson scattering from the phenomenological and experimental point of view, for the best exploitation of the data that will be delivered by existing and future particle colliders.

A search for resonance like structures in the B0sπ± invariant mass spectrum is performed using proton-proton collision data collected by the CMS experiment at the LHC at √s=8 TeV, corresponding to an integrated luminosity of 19.7 fb−1. The B0s mesons are reconstructed in the decay chain B0s→J/ψϕ, with J/ψ→μ+μ− and ϕ→K+K−. The B0sπ± invariant mass distribution shows no statistically significant peaks for different selection requirements on the reconstructed B0s and π± candidates. Upper limits are set on the relative production rates of the X(5568) and B0s states times the branching fraction of the decay X(5568)±→B0sπ±. In addition, upper limits are obtained as a function of the mass and the natural width of possible exotic states decaying into B0sπ±.