EPJ C - No sign of supersymmetry

Most stringent limits ever set by ATLAS

"Supersymmetry - to be or not to be?" remains a still unanswered question - it is a traditionally difficult business to demonstrate a zero result in experimental physics - yet the ATLAS collaboration has just set new and very stringent limitations on the "viability space" of a class of new physics models incorporating gauge-mediated supersymmetry breaking.

To this end, the collaboration analyzed all channels where W or Z bosons decay into two photons and at least one neutrino while featuring a large missing transverse energy (i.e. measured in all directions perpendicular to the beam axis), these channels being particularly sensitive to new physics in these models.

No deviations from standard model predictions were observed, putting upper limits to the cross-sections for new physics and thus raising significantly the lower mass limits for postulated supersymmetric particles - e.g. to 560 GeV for the gluino mass at a 95% confidence level (see figure).

As an added "bonus" the same results also contributed to ruling out easily observable extra dimensions - the inverse value of the compactification radius of specific models with one universal extra dimension was estimated to be at least 961 GeV with a 95% confidence level.

This was our first experience of publishing with EPJ Web of Conferences. We contacted the publisher in the middle of September, just one month prior to the Conference, but everything went through smoothly. We have had published MNPS Proceedings with different publishers in the past, and would like to tell that the EPJ Web of Conferences team was probably the best, very quick, helpful and interactive. Typically, we were getting responses from EPJ Web of Conferences team within less than an hour and have had help at every production stage.
We are very thankful to Solange Guenot, Web of Conferences Publishing Editor, and Isabelle Houlbert, Web of Conferences Production Editor, for their support. These ladies are top-level professionals, who made a great contribution to the success of this issue. We are fully satisfied with the publication of the Conference Proceedings and are looking forward to further cooperation. The publication was very fast, easy and of high quality. My colleagues and I strongly recommend EPJ Web of Conferences to anyone, who is interested in quick high-quality publication of conference proceedings.

On behalf of the Organizing and Program Committees and Editorial Team of MNPS-2019, Dr. Alexey B. Nadykto, Moscow State Technological University “STANKIN”, Moscow, Russia. EPJ Web of Conferences vol. 224 (2019)

ISSN: 2100-014X (Electronic Edition)

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