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Fast triggering in high-energy physics experiments using hardware neural networks

B. Denby, P. Garda, B. Granado, C. Kiesling, J.-C. Prevotet, A. Wassatsch
2003 IEEE Transactions on Neural Networks  
The neural triggering problem is presented here via a detailed look at the H1 level 2 trigger at the HERA accelerator in Hamburg, Germany, followed by a section on the importance of hardware preprocessing  ...  Neural networks implemented in hardware have been the solution of choice for certain experiments.  ...  A conclusion is given in section V. II. THE H1 EXPERIMENT LEVEL 2 NEURAL NETWORK TRIGGER AT HERA A. HERA Accelerator and H1 Experiment The HERA accelerator [2] is a typical 'collider' design.  ... 
doi:10.1109/tnn.2003.816903 pmid:18244556 fatcat:a5dmjahvnbdedafuuh7bdvy47a

The Liquid Argon Jet Trigger of the H1 experiment at HERA

Ana Dubak, Markus Fras, Werner Haberer, Christian Kiesling, Bob Olivier, Andreas Wassatsch
2008 2008 IEEE Nuclear Science Symposium Conference Record  
We report on a novel trigger for the liquid argon calorimeter which was installed in the H1 Experiment at HERA.  ...  This trigger, called the "Jet Trigger", was running at level 1 and implemented a real-time cluster algorithm.  ...  This was achieved in three further trigger levels: The second level was realized by dedicated microprocessors, a track-based trigger [15] , and a neural network trigger [17] , [18] with inputs from  ... 
doi:10.1109/nssmic.2008.4774934 fatcat:iqeqebmiyzhxrfqzxijc642whq

The liquid argon jet trigger of the H1 Experiment at HERA

Christian Kiesling, Ana Dubak, Bob Olivier
2010 Nuclear Instruments and Methods in Physics Research Section A : Accelerators, Spectrometers, Detectors and Associated Equipment  
We report on a novel trigger for the liquid argon calorimeter which was installed in the H1 Experiment at HERA.  ...  This trigger, called the "Jet Trigger", was running at level 1 and implemented a real-time cluster algorithm.  ...  We acknowledge in particular our colleague Stefan Schmitt who, in his position as H1 trigger coordinator, was essential in the successful commissioning and running of the Jet Trigger.  ... 
doi:10.1016/j.nima.2010.03.054 fatcat:blrf6q4elfatllbxo3oeotiahy

Measurement of Lepton-Jet Correlation in Deep-Inelastic Scattering with the H1 Detector Using Machine Learning for Unfolding

V. Andreev, M. Arratia, A. Baghdasaryan, A. Baty, K. Begzsuren, A. Belousov, A. Bolz, V. Boudry, G. Brandt, D. Britzger, A. Buniatyan, L. Bystritskaya (+133 others)
2022 Physical review letters 128(13)  
These data, taken with the H1 detector at HERA, are corrected for detector effects using an unbinned machine learning algorithm (multifold), which considers eight observables simultaneously in this first  ...  The first measurement of lepton-jet momentum imbalance and azimuthal correlation in lepton-proton scattering at high momentum transfer is presented.  ...  The HERA experiments can cover the entire kinematic region Q 2 ≈ 1-10000 GeV 2 , so they can yield a key ingredient to connecting the existing experimental and theoretical information, including with lattice  ... 
doi:10.3204/pubdb-2022-01856 fatcat:pe52umwyonaavlkzskt7ylovlm

Electroweak and beyond the Standard Model physics

B. Heinemann
2005 AIP Conference Proceedings  
We focus on recent results from the HERA and Tevatron accelerators and also discuss measurements at the B factories and the future at the LHC.  ...  The status of the electroweak Standard Model and searches for physics beyond the Standard Model are reviewed.  ...  ACKNOWLEDGMENTS It's a pleasure to be able to thank all the participants for their interesting talks and lively discussion, and the organisers for an exciting and perfectly organised workshop.  ... 
doi:10.1063/1.2122022 fatcat:yg74e7yp7vdhvcetulpkfzmasq

Measurement of lepton-jet correlation in deep-inelastic scattering with the H1 detector using machine learning for unfolding [article]

H1 Collaboration: V. Andreev
2022 arXiv   pre-print
These data, taken with the H1 detector at HERA, are corrected for detector effects using an unbinned machine learning algorithm OmniFold, which considers eight observables simultaneously in this first  ...  The first measurement of lepton-jet momentum imbalance and azimuthal correlation in lepton-proton scattering at high momentum transfer is presented.  ...  We thank the engineers and technicians for their work in constructing and maintaining the H1 detector, our funding  ... 
arXiv:2108.12376v2 fatcat:bkalxhiy6bfzhowozd2l2btjye

Measurement of Lepton-Jet Correlation in Deep-Inelastic Scattering with the H1 Detector Using Machine Learning for Unfolding

V. Andreev, M. Arratia, A. Baghdasaryan, A. Baty, K. Begzsuren, A. Belousov, A. Bolz, V. Boudry, G. Brandt, D. Britzger, A. Buniatyan, L. Bystritskaya (+133 others)
2022 Physical review letters : PRL 128(13)  
The HERA experiments can cover the entire kinematic region Q 2 ≈ 1-10000 GeV 2 , so they can yield a key ingredient to connecting the existing experimental and theoretical information, including with lattice  ...  A brief technical review of the MULTIFOLD method can be found in the Supplemental Material [112] , including the statistical origin of the reweighting [113, 114] and properties of the neural networks  ... 
doi:10.18154/rwth-2022-05755 fatcat:qvc2zf66ojfu5lhlk54gtccs2m

Physics with Tau Leptons at HERA

C. Veelken
2007 Nuclear Physics B - Proceedings Supplements  
on behalf of the H1 and ZEUS collaborations Recent results of analyses investigating the production of tau leptons in ep collisions at HERA are reviewed.  ...  In total, four different types of analyses are presented: the production of τ + τ − pairs, the production of single, isolated tau leptons in events with large missing transverse momentum (in addition to  ...  For the training of the neural networks, a set of jetshape observables reconstructed from hits in the drift chambers and from energy deposits in the calorimeters are used [8] .  ... 
doi:10.1016/j.nuclphysbps.2007.03.027 fatcat:oe6dymugwfabtfs5xfmynvfs6y

Reconstructing the Kinematics of Deep Inelastic Scattering with Deep Learning [article]

Miguel Arratia, Daniel Britzger, Owen Long, Benjamin Nachman
2021 arXiv   pre-print
We introduce a method to reconstruct the kinematics of neutral-current deep inelastic scattering (DIS) using a deep neural network (DNN).  ...  Our method has the potential to extend the kinematic reach of future experiments at the EIC, and thus their discovery potential in polarized and nuclear DIS.  ...  Acknowledgments We thank our colleagues from the H1 Collaboration for allowing us to use the simulated MC event samples and for providing valuable feedback to the analysis an on the manusript, in particular  ... 
arXiv:2110.05505v1 fatcat:smmh62nbebblzg5ujb6h26ir24

Tau lepton production in ep collisions at HERA

A. Aktas, V. Andreev, T. Anthonis, B. Antunovic, S. Aplin, A. Asmone, A. Astvatsatourov, A. Babaev, S. Backovic, A. Baghdasaryan, P. Baranov, E. Barrelet (+283 others)
2006 European Physical Journal C: Particles and Fields  
The production of tau leptons in ep collisions is investigated using data recorded by the H1 detector at HERA in the period 1994-2000.  ...  The cross section for the production of tau lepton pairs is measured for the first time at HERA.  ...  Acknowledgements We are grateful to the HERA machine group whose outstanding efforts have made this experiment possible.  ... 
doi:10.1140/epjc/s10052-006-0028-2 fatcat:3n732unjbje2nabgt5ozhhhgju

Review of searches for rare processes and physics beyond the Standard Model at HERA

David M. South, Monica Turcato
2016 European Physical Journal C: Particles and Fields  
The electron-proton collisions collected by the H1 and ZEUS experiments at HERA comprise a unique particle physics data set, and a comprehensive range of measurements has been performed to provide new  ...  The high centre of mass energy at HERA has also allowed rare processes to be studied, including the production of W and Z bosons and events with multiple leptons in the final state.  ...  There are two components: a topological trigger, which employs pattern recognition using a 2D projection (or topology) of the event in θ and φ and a neural network based system.  ... 
doi:10.1140/epjc/s10052-016-4152-3 fatcat:xmsnqrrbirehhp3m26veugrmnq

Measurement of the charm and beauty structure functions using the H1 vertex detector at HERA

F. D. Aaron, M. Aldaya Martin, C. Alexa, K. Alimujiang, V. Andreev, B. Antunovic, A. Asmone, S. Backovic, A. Baghdasaryan, E. Barrelet, W. Bartel, K. Begzsuren (+235 others)
2009 European Physical Journal C: Particles and Fields  
Inclusive charm and beauty cross sections are measured in e-p and e+p neutral current collisions at HERA in the kinematic region of photon virtuality 5<Q^2<2000 GeV^2 and Bjorken scaling variable 0.0002  ...  The data were collected with the H1 detector in the years 2006 and 2007 corresponding to an integrated luminosity of 189 pb^-1.  ...  Acknowledgements We are grateful to the HERA machine group whose outstanding efforts have made this experiment possible.  ... 
doi:10.1140/epjc/s10052-009-1190-0 fatcat:fduknuxtd5g4las3szm4mvipwi

Measurement of beauty production in deep inelastic scattering at HERA

S. Chekanov, M. Derrick, J.H. Loizides, S. Magill, S. Miglioranzi, B. Musgrave, J. Repond, R. Yoshida, M.C.K. Mattingly, N. Pavel, P. Antonioli, G. Bari (+322 others)
2004 Physics Letters B  
the ZEUS detector at HERA using integrated luminosity of 72 pb^-1.  ...  The beauty production cross section for deep inelastic scattering events with at least one hard jet in the Breit frame together with a muon has been measured, for photon virtualities Q^2 > 2 GeV^2, with  ...  The level 1 decision is validated using three trigger systems: the topological trigger and the neural network trigger combine information from trackers, calorimeters and the muon system.  ... 
doi:10.1016/j.physletb.2004.08.048 fatcat:ivpdfg3sprafnhthizim2dojly

Searches for new particles

Arnulf Quadt
2004 European Physical Journal C: Particles and Fields  
The main focus is placed on results obtained at LEP, HERA and the Tevatron on generic searches such as searches for excited fermions, searches for leptoquarks and high-p_T leptons.  ...  Also interpretations in the context of anomalous single top production via flavour-changing neutral current, large extra space dimensions, supersymmetry, and various searches for Higgs bosons are discussed  ...  Acknowledgements I would like to thank the organisers of the HEP2003 Europhysics Conference in Aachen, Germany, for their hospitality.  ... 
doi:10.1140/epjcd/s2004-03-1736-0 fatcat:syptyz77n5dgtp72ul3cea4z74

Measurement of beauty photoproduction near threshold using di-electron events with the H1 detector at HERA

F. D. Aaron, C. Alexa, V. Andreev, S. Backovic, A. Baghdasaryan, S. Baghdasaryan, E. Barrelet, W. Bartel, K. Begzsuren, A. Belousov, P. Belov, J. C. Bizot (+184 others)
2012 European Physical Journal C: Particles and Fields  
The cross section for ep -> e bb̅ X in photoproduction is measured with the H1 detector at the ep-collider HERA.  ...  The differential production cross section is measured as a function of the average transverse momentum of the beauty quarks down to the threshold.  ...  Acknowledgements We are grateful to the HERA machine group whose outstanding efforts have made this experiment possible.  ... 
doi:10.1140/epjc/s10052-012-2148-1 fatcat:5vujbozmbvestcpx3dluia4ccm
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