Enabling Real-Time Analysis at LHCb

A new streaming strategy of the LHCb experiment includes the possibility to perform the physics analysis with candidates reconstructed in the trigger, thus bypassing the offline reconstruction. In the Turbo stream the trigger writes out a compact summary of physics objects containing all information necessary for analyses. This allows an increased output rate and thus higher average efficiencies. The Turbo stream was introduced in 2015 and has allowed for and expanded physics program in Run 2 of the LHC

Mixing and time-dependent CP violation in beauty at LHCb

Recent measurements of the time-dependent CP violation are presented. The decays of $B_{s}^{0}$ mesons to $J/\psi\,K^+ K^-$ and $J/\psi\,\pi^+ \pi^-$ final states are used to measure CP-violating parameters with proton-proton collision data, corresponding to an integrated luminosity of 1.9 fb$^{-1}$, collected by the LHCb detector at a centre-of-mass energy of 13 TeV in 2015 and 2016

LHCb measurements on CPV in B decays (B→3h,ϕsB \to 3h, \phi_s, charmless B decays)

The latest results on the $CP$ violation measurements in $B$ decays are reported. The measurement of the weak phase $\phi_s^ {s \overline s}$ using the $B^0_s \to \phi \phi$ decay mode is performed on a dataset corresponding to an integrated luminosity of 5 $fb^{-1}$ collected in proton-proton collisions by the LHCb experiment. Results on the first ever measurement of the $CP$-violating phase $\phi_s^{d \overline d}$ using $B^0_s \to (K^+\pi^-)(K^- \pi^+)$ channel, based on 3$fb^{-1}$ of data, are summarised

ϕs\phi_s status and prospects at LHCb

Recent measurements of the time-dependent CP violation by the LHCb experiment are presented. The decays of $B_s$ mesons to $J/\psi K^+ K^-$ and $J/\psi \pi^+ \pi^-$ final states are used to measure the CP-violating phase $\phi_{s}$ in tree-dominated transitions, while $B_s^0\to(K^+ \pi^-) (K^- \pi^+)$ and $B_s^0\to \phi \phi$ decay modes are used to measure the CP violating phases $\phi_{s}^{sd\overline{d}}$ and $\phi_{s}^{ss\overline{s}}$, which arise in penguin-dominated decays. The most recent status of the analyses of the four decay modes is summarised

ϕs\phi_s status and prospects at LHCb

Recent measurements of the time-dependent CP violation by the LHCb experiment are presented. The decays of $B_s$ mesons to $J/\psi K^+ K^-$ and $J/\psi \pi^+ \pi^-$ final states are used to measure the CP-violating phase $\phi_{s}$ in tree-dominated transitions, while $B_s^0\to(K^+ \pi^-) (K^- \pi^+)$ and $B_s^0\to \phi \phi$ decay modes are used to measure the CP violating phases $\phi_{s}^{sd\overline{d}}$ and $\phi_{s}^{ss\overline{s}}$, which arise in penguin-dominated decays. The most recent status of the analyses of the four decay modes is summarised

LHCb measurements on CPV in BB decays (B→3hB\to3h, ϕs\phi_s, charmless BB decays)

The latest results on the $CP$ violation measurements in $B$ decays are reported. The measurement of the weak phase $\phi_s^ {s \overline s}$ using the $B^0_s \to \phi \phi$ decay mode is performed on a dataset corresponding to an integrated luminosity of 5 $fb^{-1}$ collected in proton-proton collisions by the LHCb experiment. Results on the first ever measurement of the $CP$-violating phase $\phi_s^{d \overline d}$ using $B^0_s \to (K^+\pi^-)(K^- \pi^+)$ channel, based on 3$fb^{-1}$ of data, are summarised

A new scheduling algorithm for the LHCb upgrade trigger application

During Run 3 of the LHC the LHCb detector will process a 30 MHz event rate with a full detector readout followed by a software trigger. To deal with the increased computational requirements, the software framework is reviewed and optimized on a large scale. One challenge is the efficient scheduling of $O(10^3)$-$O(10^4)$ algorithms in the High Level Trigger (HLT) application. This document describes the design of a new algorithm scheduler which allows for static-order intra-event scheduling with minimum complexity while still providing the required flexibility

Jet Single Shot Detection

We apply object detection techniques based on Convolutional Neural Networks to jet reconstruction and identification at the CERN Large Hadron Collider. In particular, we focus on CaloJet reconstruction, representing each event as an image composed of calorimeter cells and using a Single Shot Detection network, called Jet-SSD. The model performs simultaneous localization and classification and additional regression tasks to measure jet features. We investigate Ternary Weight Networks with weights constrained to {-1, 0, 1} times a layer- and channel-dependent scaling factors. We show that the quantized version of the network closely matches the performance of its full-precision equivalent