Z′-explorer: A simple tool to probe Z′ models against LHC data

ALVAREZ, EZEQUIEL; ESTÉVEZ, MARIEL; SANDÁ SEOANE, ROSA MARÍA

COMPUTER PHYSICS COMMUNICATIONS

ELSEVIER SCIENCE BV

Año: 2021 vol. 269

0010-4655

New Physics model building requires a vast number of cross-checks against available experimental results. In particular, new neutral, colorless, spin-1 bosons Z′, can be found in many models. We introduce in this work a new easy-to-use software Z′-explorer which probes Z′ models to all available decay channels at LHC. This program scrutinizes the parameter space of the model to determine which part is still allowed, which is to be shortly explored, and which channel is the most sensitive in each region of parameter space. The user does not need to implement the model nor run any Monte Carlo simulation, but instead just needs to use the Z′ mass and its couplings to Standard Model particles. We describe Z′-explorer backend and provide instructions to use it from its frontend while applying it to a variety of Z′ models. In particular, we show Z′-explorer application and utility in a sequential Standard Model, a B-L Z′ and a simplified two-sector or Warped/Composite model. The output of the program condenses the phenomenology of the model features, the experimental techniques, and the search strategies in each channel in an enriching outcome. We find that compelling add-ons to the software would be to include correlation between decay channels, low-energy physics results, and Dark Matter searches. The software is open-source ready to use, and available for modifications, improvements, and updates by the community. Program summary: Program Title:: Z′-explorer CPC Library link to program files: https://doi.org/10.17632/k7tdp8kwgf.1 Developer´s repository link: github.com/ro-sanda/Z?explorer Licensing provisions: GNU General Public License v3 Programming language: C++ and bash Nature of problem: Many New Physics models have a Z´ in its spectrum. As any new model, it should be contrasted to experimental results in all its predictions. In particular, if they have a Z´, there are many constraints that should be satisfied simultaneously. Also, one may wonder which of all these constraints ?if satisfied? would be the optimal channel to look for the Z´ in the proposed New Physics model. Solution method: The Z´-explorer software makes a fast and practical answer to both problems: i) Whether a Z´ is discarded or not by experimental results, and ii) Which is the most sensitive channel to look for it. Being very easy to implement, the Z´-explorer tool allows to test a New Physics Z´ against all the LHC direct observables of Z´ searches, and provides the sensitivity to each one of them.