Periodic Reporting for period 4 - NNLOforLHC2 (New level of theoretical precision for LHC Run 2 and beyond)
Reporting period: 2021-04-01 to 2022-09-30
The results derived in this project are unique, state-of-the-art and most have no analogues, i.e. no other competing calculations exist for the same processes. A summary of the work performed, as well as the results that have been achieved, can be found under the project's website: http://www.precision.hep.phy.cam.ac.uk
The second main trust of the grant has been the devising of new ways for making our results public. To this end our group was the first to utilize the so called fastNLO tables for calculations of highest available precision. When our results are produced in this format they are very easy to use by other researchers and, moreover, allow for extremely fast and inexpensive recalculation by changing certain parameters, which was not possible previously. Our calculations are now being produced in this format. All results made public so far are available from our webpage and are being extensively used by theorists and experimentalists alike. We have also introduced a novel concept which goes well beyond the existing state of the art in the filed: we made public the library HighTEA which allows users to perform their own NNLO calculations. The users do not need to have access to computing infrastructure or deep knowledge of a technical subject like higher order perturbative calculations in order to use it. In fact the tool can easily be used by the general public. It is meant to be a game changing addition to the ever expanding toolbox of collider physics.
We have computed the first complete prediction for dijet production at the LHC and the first prediction for 3 jets at the LHC. This allowed the first ever measurement of the running of the strong coupling constant through TeV energies with NNLO precision. Additionally, performed was the first NNLO calculation of diphoton production at non-zero transverse momentum. Another state of the art calculation was the formulation and then calculation of heavy identified hadrons with NNLO precision. Our results open the possibility for a new broad research program in this subject.
The project has also pioneered the distribution of NNLO calculation in novel formats. Specifically, the so called fastNNLO tables as well as the HighTEA database which allows any user - including the general public - to easily perform state of the art NNLO0accurate calculations.