# Welcome

The Collaborative Research Center “Particle Physics Phenomenology after the Higgs Discovery'' is a joint venture of theoretical particle physicists from Karlsruhe Institute of Technology, RWTH Aachen University, University of Siegen and Heidelberg University. It is supported by the German Research Foundation (DFG).

Particle physics has long established itself as an important research discipline focused on understanding Nature at a fundamental level. The current knowledge is summarized in a theory called the Standard Model (SM) of particle physics that describes strong and electroweak interactions. The recent discovery of the Higgs boson formally completes the SM and provides us with a consistent mathematical framework that can be used to describe Nature in fine detail. However, several aspects of the SM force us to raise questions about the foundations of this theory. Many proposed answers to these questions suggest that the SM is a low-energy approximation to a much more fundamental theory that we strive to discover.

Scientists of the CRC will conduct research in phenomenology of elementary particles focusing, in particular, on the physics of Higgs boson, physics of top quarks, electroweak gauge bosons and jets and flavour physics. Our goal is to develop the necessary methodologies to search for physics beyond the Standard Model through precise measurements at the LHC, flavour factories and elsewhere.

### Open positions

Postdoctoral and PhD positions:

The Collaborative Research Center invites applications for a number of postdoctoral and Ph.D. positions. More informations can be found here or directly contact principal investigators.

##### News

08.06.2022-10.06.2022 - The Young Scientists Meeting is a three-day meeting for all members of the Collaborative Research Center (CRC) TRR 257. Besides scientific talks, this workshop also includes talks about soft skills and gender equality. More information can be found here:

31.05.2022-02.06.2022 - Status and propects of Non-leptonic B meson decay. The aim of this event is to discuss the current status in theory and experiment of non-leptonic B meson decays. This entails talks on calculation techniques, including QCD factorization and perturbative QCD with special emphasis on the current status of estimating power corrections. More information can be found here

16.05.2022-20.05.2022 - 10th Edition of the Large Hadron Collider Physics Conference. The programme of the LHCP2022 conference will contain a detailed review of the latest experimental and theoretical results on collider physics, with many final results of the Large Hadron Collider Run-2, potentially a first glimpse of the upgraded accelerator and detector operation in Run-3, and discussions on further research directions within the high energy particle physics community, both in theory and experiment. The main goal of the conference is to provide intense and lively discussions between experimenters and theorists in such research areas as the Standard Model Physics and Beyond, the Higgs Boson, Heavy Quark Physics and Heavy Ion Physics as well as to share recent progress in the high luminosity upgrades and future collider developments. More information can be found here

12.05.2022-15.05.2022 - LoopFest XX conference, University of Pittsburgh, USA. LoopFest provides a forum for discussing the latest results in precision quantum field theory and their applications to understanding experimental data at current and future colliders.Topics include: a) The potential of the LHC and future colliders for precision measurements b) Progress in multi-loop and multi-leg calculations c) Interfacing fixed-order higher-order calculations with multi-purpose event generators d) Application of effective field theory techniques to precision calculations e) Prospects for improving PDFs for precision measurements. More information can be found here

25.04.2022-30.04.2022 - 16th Workshop on Elementary Particle Physics: Loops and Legs in Quantum Field Theory, Ettal, Germany. Topics discussed: Precision calculations and technology for scattering cross sections at high energy colliders, computer algebra, related mathematical developments, algorithms and methods, higher loop and multi-leg calculations. More information can be found here

11.04.2022-14.04.2022 - Standard Model at the LHC 2022 . The SM@LHC workshop deals with the latest developments as well as future prospects in Standard Model phenomenology at the LHC. The emphasis lies in bringing together experimentalists and theorists to stimulate discussions on the most interesting and topical aspects across the various fields. The main topics include Electroweak, Higgs, QCD, Top, Flavour Physics and EFT . More information can be found here:

29.11.2021 - The third and the last session in 2021 Public Speaking & Presentation Skills Training including Video Analysis will take place on Monday, November 29th from 09:00 till 13:00. Individual trainings will take place on Monday, November 29th (14:00-17:00) and on Tuesday, November 30th (13:00-17:00). Our trainer is Mrs. Sonja Fuhrmann - TV-journalist, TV-presenter and trainer for rhetoric and voice.

11.11.2021 - The second session Public Speaking & Presentation Skills Training including Video Analysis will take place on Thursday, November 11th from 12:00 till 16:00. Individual trainings will take place on Friday, November 12th from 9:00 till 15:00. Our trainer is Mrs. Sonja Fuhrmann - TV-journalist, TV-presenter and trainer for rhetoric and voice.

01.07.2021 - The first session Public Speaking & Presentation Skills Training including Video Analysis will take place on Thursday, July 1st from 09:00 till 13:00. Individual trainings will take place on Thursday, July 1st (14:00-17:00) and on Friday, July 2nd (13:00-17:00). Our trainer is Mrs. Sonja Fuhrmann - TV-journalist, TV-presenter and trainer for rhetoric and voice.

16.06.2021 - The second (virtual) session Physicists in Industry will take place on Wednesday, June 16th at 4.00pm. Our second speaker is Dr. Waldemar Martens (European Space Agency, ESA).

26.05.2021 - The annual meeting of the CRC TRR 257 “Particle Physics Phenomenology after the Higgs Discovery'' took place (virtually) in Aachen from May 26th to May 28th. Presentations are available online.

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##### Recent Seminars
Pheno of extended Higgs sectors

Rui Santos, 21.07.2022, Karlsruhe

10 years of Higgs discovery – Higgs couplings

Nick Wardle, 14.07.2022, Karlsruhe

TBA

Matthias Neubert, 05.07.2022, Karlsruhe

tbd

Jasmina Nasufi (RWTH Aachen University), 05.07.2022, Aachen

QCD precision measurements and PDF fits

Katerina Lipka, 30.06.2022, Karlsruhe

tbd

Marco Niggetiedt (RWTH Aachen University, 21.06.2022, Aachen

Model-independent anomaly searches at the LHC

Arnd Meyer (RWTH Aachen University), 14.06.2022, Aachen

Viewing of "Picture a Scientist”

Screening, 24.05.2022, Aachen

##### Recent Publications
Dispersive bounds for local form factors in $\Lambda_b \to \Lambda$ transitions

Thomas Blake, Stefan Meinel, Muslem Rahimi, Danny van Dyk

A first glance to the kinematic moments of $B\to X_c \ell \nu$ at third order

Matteo Fael, Kay Schönwald, Matthias Steinhauser

Scrutinizing the 95-100 GeV di-tau excess in the top associated process

Syuhei Iguro, Teppei Kitahara, Yuji Omura

Single Photon Production at Hadron Colliders at NNLO QCD with Realistic Photon Isolation

X. Chen, T. Gehrmann, E.W.N. Glover, M. Hofer, A. Huss , R. Schurmann

SMEFT predictions for gg to HH at full NLO QCD and truncation uncertainties

Gudrun Heinrich, Jannis Lang, Ludovic Scyboz

Boosting mono-jet searches with model-agnostic machine learning

Thorben Finke, Michael Krämer, Maximilian Lipp, Alexander Mück

Loop counting matters in SMEFT

G. Buchalla, G. Heinrich, Ch. Müller, F. Pandler

Complete collection of one-loop triple-collinear splitting operators for dimensionally-regulated QCD

M. Czakon, S. Sapeta

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