This is the second post in the series about public codes. Effective Field Theories (EFTs) are powerful tools to simplify the analysis of physics beyond the Standard Model (SM). At energies well below the scale of the new physics, all the information about new particles is contained in the Wilson coefficients (WCs) of dimension-6 operators. …

# WCxf: the Wilson coefficient exchange format

Here is my first post in the new series on codes, even though WCxf is more about conventions than about code. First off, it’s true, WCxf is not a very catchy name. On the other hand, it’s definitely googlable and was still available as organization name on Github! So what is it, actually? In short, …

# New blog series on public codes

Time to resuscitate the blog section of my web site! Recently, I’ve been involved in the development of a number of public codes for phenomenology. While they are mostly reasonably documented and described in papers, I realized in conversations with colleagues that there is not much awareness about what these various codes can (and cannot) …

# Reducing the hassle with BibTeX

BibTeX is great for generating bibliographies, in particular combined with Inspire, but it also has its annoying aspects. This is a typical workflow to generate references for a paper: Find the texkey of a paper on Inspire and \cite it in the manuscript Copy & paste the bibtex entry into the .bib file Correct LaTeX …

# New paper on composite Higgs

Today, a new paper entitled “Direct and indirect signals of natural composite Higgs models” by Christoph Niehoff, Peter Stangl and myself appeared on the preprint archive. Weighing 72 pages, it might be a good read on the beach in your well-deserved summer vacation!? Anyway, here is some information about why we made this analysis and …

# Relative vs. absolute $\chi^2$

On this week’s workshop on $B$ decays in Edinburgh, which unfortunately I was not able to attend, apparently there have been many interesting talks and lots of fruitful discussion. An interesting point was raised on the slides of the talk by N. Mahmoudi regarding the statistical approach taken in my recent paper with Wolfgang Altmannshofer. …

# The $B\to K^*\mu^+\mu^-$ anomaly persists

tl;dr The $B\to K^*\mu^+\mu^-$ anomaly is still there, global fit prefers new physics in $C_9$ over SM by $3.7\sigma$, interpretation as hadronic effect not excluded though. Two years ago the LHCb experiment measured a significant deviation from the Standard Model predictions in one of the angular observables of the $B\to K^*\mu^+\mu^-$ decay (prosaically called $P_5’$). …

# New paper on $b\to s\nu\bar\nu$!

Today my collaborators Andrzej Buras, Jennifer Girrbach-Noe, Christoph Niehoff and I released our new paper on the decays $B\to K\nu\bar\nu$ and $B\to K^*\nu\bar\nu$. These two closely related decays are sensitive to physics beyond the Standard Model and will very likely be observed for the first time at the upcoming Belle-II experiment. It was about time …

# Lecture “Physics beyond the Standard Model” at TUM

In the winter semester 2014/15, I will offer a special lecture on “Physics beyond the Standard Model” at TUM. The lecture will take place in the “Handbibliothek” (room 3343 in the Physics Department) every Wednesday from 10:30-12:00 (note the change of time), starting on October 8. The lecture is targeted at Master students. The aim is to …