CMS-PAS-EXO-14-005

CMS-PAS-EXO-14-005
Search for Resonances Decaying to Dijet Final States at $\sqrt{s} = $ 8 TeV with the Novel CMS Data Scouting Technique
CMS Collaboration
October 2015

Abstract: A search for narrow resonances decaying to dijet final states is performed in proton-proton collisions at a center-of-mass energy $\sqrt{s}= $ 8 TeV corresponding to an integrated luminosity of 18.8 fb$^{-1}$. The data is collected by the CMS detector with a novel technique called data scouting using a loose online data selection and a reduced data format. The search extends to low dijet mass, testing previously unprobed low values of resonance couplings to quarks and gluons. No evidence for new particle production is found. The result is interpreted as upper limits on the production cross section as a function of the resonance mass. These limits are translated into an upper limit on the resonance coupling, allowing a comparison with results obtained in the same mass region at lower collision energies. These are the most stringent limits to date in the dijet final state for resonances masses between about 500 and 800 GeV.
Links: CDS record (PDF) ; CADI line (restricted) ; These preliminary results are superseded in this paper, PRL 117 (2016) 031802.

Figures	Summary	References	CMS Publications

Figures
png pdf	Figure 1: The reconstructed dijet mass distribution (black points) fitted with a smooth function (red solid line). The bottom panel shows the standard score of the fit result with respect to the number of events in the data.
png pdf	Figure 2: Signal distribution of $m_{jj}$ for RS gravitons decaying to $\mathrm {q \bar{q}}$, exited quarks decaying to $\mathrm {q g}$, and RS gravitons decaying to $\mathrm {gg}$, for the resonance mass of 900 GeV.
png pdf	Figure 3: 95% CL upper limits on $\sigma \times $BR$\times $A for a narrow resonance decaying to $\mathrm {gg}$ final states (open circles), $\mathrm {gq}$ final states (open squares), and $\mathrm {qq}$ final states (open triangles).
png pdf	Figure 4: Coupling upper limit for a $Z^{'}_B$ resonance, as a function of its mass. The results from this study is compared to results obtained with similar searches at different collider energies [21,31].

Summary

References
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