Operation and performance of the ATLAS semiconductor tracker in LHC Run 2

Journal of Instrumentation IOP Publishing 17:01 (2022) P01013-P01013

Authors:

Georges Aad, Brad Abbott, Dale Charles Abbott, Adam Abed Abud, Kira Abeling, Deshan Kavishka Abhayasinghe, Syed Haider Abidi, Asmaa Aboulhorma, Halina Abramowicz, Henso Abreu, Yiming Abulaiti, Angel Christian Abusleme Hoffman, Bobby Samir Acharya, Baida Achkar, Lennart Adam, Claire Adam Bourdarios, Sagar Vidya Addepalli, Melike Akbiyik, Torsten Paul Ake Åkesson, Andrei Akimov, Konie Al Khoury, Martin Aleksa, Igor Aleksandrov, Calin Alexa

Abstract:

<jats:title>Abstract</jats:title> <jats:p>The semiconductor tracker (SCT) is one of the tracking systems for charged particles in the ATLAS detector. It consists of 4088 silicon strip sensor modules. During Run 2 (2015–2018) the Large Hadron Collider delivered an integrated luminosity of 156 fb<jats:sup>-1</jats:sup> to the ATLAS experiment at a centre-of-mass proton-proton collision energy of 13 TeV. The instantaneous luminosity and pile-up conditions were far in excess of those assumed in the original design of the SCT detector. Due to improvements to the data acquisition system, the SCT operated stably throughout Run 2. It was available for 99.9% of the integrated luminosity and achieved a data-quality efficiency of 99.85%. Detailed studies have been made of the leakage current in SCT modules and the evolution of the full depletion voltage, which are used to study the impact of radiation damage to the modules.</jats:p>

Advances in Multi-Variate Analysis Methods for New Physics Searches at the Large Hadron Collider

Reviews in Physics 7 (2021)

Authors:

A Stakia, T Dorigo, G Banelli, D Bortoletto, A Casa, P de Castro, C Delaere, J Donini, L Finos, M Gallinaro, A Giammanco, A Held, FJ Morales, G Kotkowski, SP Liew, F Maltoni, G Menardi, I Papavergou, A Saggio, B Scarpa, GC Strong, C Tosciri, J Varela, P Vischia, A Weiler

Abstract:

Between the years 2015 and 2019, members of the Horizon 2020-funded Innovative Training Network named “AMVA4NewPhysics” studied the customization and application of advanced multivariate analysis methods and statistical learning tools to high-energy physics problems, as well as developed entirely new ones. Many of those methods were successfully used to improve the sensitivity of data analyses performed by the ATLAS and CMS experiments at the CERN Large Hadron Collider; several others, still in the testing phase, promise to further improve the precision of measurements of fundamental physics parameters and the reach of searches for new phenomena. In this paper, the most relevant new tools, among those studied and developed, are presented along with the evaluation of their performances.

Hybrid quantum classical graph neural networks for particle track reconstruction

QUANTUM MACHINE INTELLIGENCE 3:2 (2021) ARTN 29

Authors:

Cenk Tuysuz, Carla Rieger, Kristiane Novotny, Bilge Demirkoz, Daniel Dobos, Karolos Potamianos, Sofia Vallecorsa, Jean-Roch Vlimant, Richard Forster

Measurement of the charge asymmetry of electrons from the decays of W bosons produced in p p ¯ collisions at s =1.96 TeV MEASUREMENT of the CHARGE ASYMMETRY of ELECTRONS ... T. AALTONEN et al.

Physical Review D 104:9 (2021)

Authors:

T Aaltonen, S Amerio, D Amidei, A Anastassov, A Annovi, J Antos, G Apollinari, JA Appel, T Arisawa, A Artikov, J Asaadi, W Ashmanskas, B Auerbach, A Aurisano, F Azfar, W Badgett, T Bae, A Barbaro-Galtieri, VE Barnes, BA Barnett, P Barria, P Bartos, M Bauce, F Bedeschi, S Behari, G Bellettini, J Bellinger, D Benjamin, A Beretvas, A Bhatti, KR Bland, B Blumenfeld, A Bocci, A Bodek, D Bortoletto, J Boudreau, A Boveia, L Brigliadori, C Bromberg, E Brucken, J Budagov, HS Budd, K Burkett, G Busetto, P Bussey, P Butti, A Buzatu, A Calamba, S Camarda, M Campanelli, F Canelli, B Carls, D Carlsmith, R Carosi, S Carrillo, B Casal, M Casarsa, A Castro, P Catastini, D Cauz, V Cavaliere, A Cerri, L Cerrito, YC Chen, M Chertok, G Chiarelli, G Chlachidze, K Cho, D Chokheli, A Clark, C Clarke, ME Convery, J Conway, M Corbo, M Cordelli, CA Cox, DJ Cox, M Cremonesi, D Cruz, J Cuevas, R Culbertson, N D'Ascenzo, M Datta, P De Barbaro, L Demortier, M Deninno, M D'Errico, F Devoto, A Di Canto, B Di Ruzza, JR Dittmann, S Donati, M D'Onofrio, M Dorigo, A Driutti, K Ebina, R Edgar, A Elagin, R Erbacher, S Errede

Abstract:

At the Fermilab Tevatron proton-antiproton (pp¯) collider, high-mass electron-neutrino (eν) pairs are produced predominantly in the process pp¯→W(→eν)+X. The asymmetry of the electron and positron yield as a function of their pseudorapidity constrain the slope of the ratio of the u- to d-quark parton distributions versus the fraction of the proton momentum carried by the quarks. This paper reports on the measurement of the electron-charge asymmetry using the full data set recorded by the Collider Detector at Fermilab in 2001-2011 and corresponding to 9.1 fb-1 of integrated luminosity. The measurement significantly improves the precision of the Tevatron constraints on the parton-distribution functions of the proton. Numerical tables of the measurement are provided.

Matter-wave Atomic Gradiometer Interferometric Sensor (MAGIS-100)

QUANTUM SCIENCE AND TECHNOLOGY 6:4 (2021) ARTN 044003

Authors:

Mahiro Abe, Philip Adamson, Marcel Borcean, Daniela Bortoletto, Kieran Bridges, Samuel P Carman, Swapan Chattopadhyay, Jonathon Coleman, Noah M Curfman, Kenneth DeRose, Tejas Deshpande, Savas Dimopoulos, Christopher J Foot, Josef C Frisch, Benjamin E Garber, Steve Geer, Valerie Gibson, Jonah Glick, Peter W Graham, Steve R Hahn, Roni Harnik, Leonie Hawkins, Sam Hindley, Jason M Hogan, Yijun Jiang, Mark A Kasevich, Ronald J Kellett, Mandy Kiburg, Tim Kovachy, Joseph D Lykken, John March-Russell, Jeremiah Mitchell, Martin Murphy, Megan Nantel, Lucy E Nobrega, Robert K Plunkett, Surjeet Rajendran, Jan Rudolph, Natasha Sachdeva, Murtaza Safdari, James K Santucci, Ariel G Schwartzman, Ian Shipsey, Hunter Swan, Linda R Valerio, Arvydas Vasonis, Yiping Wang, Thomas Wilkason