pyhf is a pure-python implementation of the widely-used HistFactory p.d.f. template described in [CERN-OPEN-2012-016]. It also includes interval estimation is based on the asymptotic formulas of “Asymptotic formulae for likelihood-based tests of new physics” [arxiv:1007.1727]. The aim is also to support modern computational graph libraries such as PyTorch and TensorFlow in order to make use of features such as autodifferentiation and GPU acceleration.
Featured on CERN homepage and in Symmetry Magazine and the CERN Courier
- The CERN homepage featured an article on pyhf: New open release allows theorists to explore LHC data in a new way: The ATLAS collaboration releases full analysis likelihoods, a first for an LHC experiment. (January, 2020)
- Symmetry Magazine: ATLAS releases ‘full orchestra’ of analysis instruments (January, 2021)
- CERN Courier May/June 2021 Issue: LHC reinterpreters think long-term (April, 2021)
Recent Talks and Tutorials
- Matthew Feickert’s SciPy 2020 talk:
pyhftutorial (continually updated to use the lastest
- Past tutorials (with recordings on YouTube) are listed on the tutorial GitHub project
Use in Publications
Updating list of citations and use cases of
- Belle II Collaboration. Search for B⁺→ K⁺νν̅ decays using an inclusive tagging method at Belle II. Apr 2021. arXiv:2104.12624.
- Andrei Angelescu, Damir Bečirević, Darius A. Faroughy, Florentin Jaffredo, and Olcyr Sumensari. On the single leptoquark solutions to the B-physics anomalies. Mar 2021. arXiv:2103.12504.
- Rodolfo Capdevilla, Federico Meloni, Rosa Simoniello, and Jose Zurita. Hunting wino and higgsino dark matter at the muon collider with disappearing tracks. Feb 2021. arXiv:2102.11292.
- Vincenzo Cirigliano, Kaori Fuyuto, Christopher Lee, Emanuele Mereghetti, and Bin Yan. Charged Lepton Flavor Violation at the EIC. Feb 2021. arXiv:2102.06176.
- Jack Y. Araz and others. Proceedings of the second MadAnalysis 5 workshop on LHC recasting in Korea. Mod. Phys. Lett. A, 36(01):2102001, 2021. arXiv:2101.02245, doi:10.1142/S0217732321020016.
- Simone Amoroso, Deepak Kar, and Matthias Schott. How to discover QCD Instantons at the LHC. In Topological Effects in the Standard Model: Instantons, Sphalerons and Beyond at LHC. Dec 2020. arXiv:2012.09120.
- Wolfgang Waltenberger, André Lessa, and Sabine Kraml. Artificial Proto-Modelling: Building Precursors of a Next Standard Model from Simplified Model Results. Dec 2020. arXiv:2012.12246, doi: 10.1007/JHEP03(2021)207.
- Gaël Alguero, Jan Heisig, Charanjit K. Khosa, Sabine Kraml, Suchita Kulkarni, Andre Lessa, Philipp Neuhuber, Humberto Reyes-González, Wolfgang Waltenberger, and Alicia Wongel. New developments in SModelS. In Tools for High Energy Physics and Cosmology. Dec 2020. arXiv:2012.08192.
- Matthew Feickert, Lukas Heinrich, and Giordon Stark. Likelihood preservation and statistical reproduction of searches for new physics. EPJ Web Conf., Nov 2020. doi:10.1051/epjconf/202024506017.
- Gaël Alguero, Sabine Kraml, and Wolfgang Waltenberger. A SModelS interface for pyhf likelihoods. Sep 2020. arXiv:2009.01809.
- ATLAS Collaboration. Search for new phenomena in events with two opposite-charge leptons, jets and missing transverse momentum in pp collisions at s√=13 TeV with the ATLAS detector. Geneva, Aug 2020. URL: https://cds.cern.ch/record/2684863.
- Jeffrey Krupa and others. GPU coprocessors as a service for deep learning inference in high energy physics. July 2020. arXiv:2007.10359.
- Charanjit K. Khosa, Sabine Kraml, Andre Lessa, Philipp Neuhuber, and Wolfgang Waltenberger. SModelS database update v1.2.3. LHEP, 158:2020, May 2020. arXiv:2005.00555, doi:10.31526/lhep.2020.158.
- Waleed Abdallah and others. Reinterpretation of LHC Results for New Physics: Status and Recommendations after Run 2. 2020. arXiv:2003.07868.
- G. Brooijmans and others. Les Houches 2019 Physics at TeV Colliders: New Physics Working Group Report. In 2020. arXiv:2002.12220.
- Andrei Angelescu, Darius A. Faroughy, and Olcyr Sumensari. Lepton Flavor Violation and Dilepton Tails at the LHC. Eur. Phys. J. C, 80(7):641, 2020. arXiv:2002.05684, doi:10.1140/epjc/s10052-020-8210-5.
- B.C. Allanach, Tyler Corbett, and Maeve Madigan. Sensitivity of Future Hadron Colliders to Leptoquark Pair Production in the Di-Muon Di-Jets Channel. Eur. Phys. J. C, 80(2):170, 2020. arXiv:1911.04455, doi:10.1140/epjc/s10052-020-7722-3.
- J. Alison and others. Higgs boson potential at colliders: status and perspectives. In 2019. arXiv:1910.00012.
- ATLAS Collaboration. Reproducing searches for new physics with the ATLAS experiment through publication of full statistical likelihoods. Geneva, Aug 2019. URL: https://cds.cern.ch/record/2684863.
- Johann Brehmer, Felix Kling, Irina Espejo, and Kyle Cranmer. MadMiner: Machine learning-based inference for particle physics. Comput. Softw. Big Sci., 4(1):3, 2020. arXiv:1907.10621, doi:10.1007/s41781-020-0035-2.
- Lukas Heinrich, Holger Schulz, Jessica Turner, and Ye-Ling Zhou. Constraining A₄ Leptonic Flavour Model Parameters at Colliders and Beyond. 2018. arXiv:1810.05648.
Updating list of HEPData entries for publications using
HistFactory JSON likelihoods:
- Search for trilepton resonances from chargino and neutralino pair production in s√=13 TeV pp collisions with the ATLAS detector. 2020. doi:10.17182/hepdata.99806.
- Search for displaced leptons in s√=13 TeV pp collisions with the ATLAS detector. 2020. doi:10.17182/hepdata.98796.
- Search for squarks and gluinos in final states with same-sign leptons and jets using 139 fb−1 of data collected with the ATLAS detector. 2020. doi:10.17182/hepdata.91214.
- Search for direct production of electroweakinos in final states with one lepton, missing transverse momentum and a Higgs boson decaying into two b-jets in (pp) collisions at s√=13 TeV with the ATLAS detector. 2020. doi:10.17182/hepdata.90607.
- Search for chargino-neutralino production with mass splittings near the electroweak scale in three-lepton final states in s√ = 13 TeV pp collisions with the ATLAS detector. 2019. doi:10.17182/hepdata.91127.
- Search for direct stau production in events with two hadronic τ-leptons in s√=13 TeV pp collisions with the ATLAS detector. 2019. doi:10.17182/hepdata.92006.
- Search for bottom-squark pair production with the ATLAS detector in final states containing Higgs bosons, b-jets and missing transverse momentum. 2019. doi:10.17182/hepdata.89408.
- 20 May 2021 - "Distributed statistical inference with pyhf enabled through funcX", Matthew Feickert, vCHEP 2021 Conference
- 8 Dec 2020 - "Steps Towards Differentiable and Scalable Physics Analyses at the LHC", Matthew Feickert, Argonne Lunch Seminar
- 4 Dec 2020 - "Fitting and Statistical Inference as a Service", Matthew Feickert, Mini-Workshop on Portable Inference
- 3 Nov 2020 - "pyhf: pure-Python implementation of HistFactory with tensors and automatic differentiation", Matthew Feickert, Tools for High Energy Physics and Cosmology 2020 Workshop
- 26 Oct 2020 - "Toward Fitting as a Service with pyhf", Matthew Feickert, IRIS-HEP Future Analysis Systems and Facilities Blueprint Workshop
- 10 Aug 2020 - "Likelihood Publication and Preservation", Matthew Feickert, Snowmass 2021 Computational Frontier Workshop
- 16 Jul 2020 - "pyhf Tutorial: Accelerating analyses and preserving likelihoods", Matthew Feickert, PyHEP 2020 Workshop
- 7 Jul 2020 - "pyhf: a pure Python statistical fitting library with tensors and autograd", Matthew Feickert, 19th Python in Science Conference (SciPy 2020)
- 27 May 2020 - "pyhf Roadmap for IRIS-HEP Execution Phase", Matthew Feickert, 2020 IRIS-HEP Team Retreat
- 27 Feb 2020 - "pyhf: A Pure Python Statistical Fitting Library with Tensors and Autograd", Matthew Feickert, IRIS-HEP Postdoc Presentations
- 27 Feb 2020 - "pyhf: Pure Python Implementation of HistFactory", Matthew Feickert, IRIS-HEP Poster Session 2020
- 25 Nov 2019 - "An introduction to pyhf and HistFactory likelihoods", Matthew Feickert, LHCb Statistics Working Group
- 7 Nov 2019 - "Likelihood preservation and statistical reproduction of searches for new physics", Matthew Feickert, CHEP 2019 Conference
- 5 Nov 2019 - "pyhf: a pure Python implementation of HistFactory with tensors and autograd (poster)", Matthew Feickert, CHEP 2019 Conference
- 18 Oct 2019 - "pyhf: pure-Python implementation of HistFactory", Matthew Feickert, PyHEP 2019 Workshop
- 12 Sep 2019 - "pyhf Roadmap: 2019 into 2020", Matthew Feickert, 2019 IRIS-HEP Institute Retreat
- 9 Jul 2019 - "pyhf: a pure Python statistical fitting library for High Energy Physics with tensors and autograd", Matthew Feickert, 18th annual Scientific Computing with Python conference (SciPy 2019)
- 29 Oct 2018 - "pyhf: a pure Python implementation of HistFactory with tensors and autograd", Matthew Feickert, DIANA/HEP Meeting
- Distributed statistical inference with pyhf enabled through funcX, M. Feickert, L. Heinrich, G. Stark and B. Galewsky, arXiv 2103.02182 (03 Mar 2021).
- pyhf: pure-Python implementation of HistFactory statistical models, L. Heinrich, M. Feickert, G. Stark and K. Cranmer, J.Open Source Softw. 6 2823 (2021) (04 Feb 2021) [1 citation].
- Reproducing searches for new physics with the ATLAS experiment through publication of full statistical likelihoods, ATL-PHYS-PUB-2019-029 (05 Aug 2019).
- Open is not enough, X. Chen et. al., Nature Phys. 15 (2019) (15 Nov 2018) [13 citations].