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Probing a Very Narrow $Z'$ Boson with CDF and D0 Data

Daniel Feldman, Zuowei Liu, Pran Nath

TL;DR

A Drell-Yan analysis for dilepton production via this Z' shows that the current data put constraints on the parameter space of the StSM, which will be very distinct since it can occur in the region where a Randall-Sundrum graviton is excluded.

Abstract

The CDF and D0 data of nearly 475 $\text{pb}^{-1}$ in the dilepton channel is used to probe a recent class of models, Stueckelberg extensions of the Standard Model (StSM), which predict a $Z'$ boson whose mass is of topological origin with a very narrow decay width. A Drell-Yan analysis for dilepton production via this $Z'$ shows that the current data put constraints on the parameter space of the StSM. With a total integrated luminosity of $8 $ $\text{fb}^{-1}$, the very narrow $Z'$ can be discovered up to a mass of about 600 GeV. The StSM $Z'$ will be very distinct since it can occur in the region where a Randall-Sundrum graviton is excluded.

Probing a Very Narrow $Z'$ Boson with CDF and D0 Data

TL;DR

A Drell-Yan analysis for dilepton production via this Z' shows that the current data put constraints on the parameter space of the StSM, which will be very distinct since it can occur in the region where a Randall-Sundrum graviton is excluded.

Abstract

The CDF and D0 data of nearly 475 in the dilepton channel is used to probe a recent class of models, Stueckelberg extensions of the Standard Model (StSM), which predict a boson whose mass is of topological origin with a very narrow decay width. A Drell-Yan analysis for dilepton production via this shows that the current data put constraints on the parameter space of the StSM. With a total integrated luminosity of , the very narrow can be discovered up to a mass of about 600 GeV. The StSM will be very distinct since it can occur in the region where a Randall-Sundrum graviton is excluded.

Paper Structure

This paper contains 9 equations, 3 figures, 1 table.

Figures (3)

  • Figure 1: $Z'$ signal in StSM using the CDF cdfdata and D0 Abazov:2005pi data. The data puts a lower limit of about 250 GeV on $M_{Z'}$ for $\epsilon \approx 0.035$ and 375 GeV for $\epsilon \approx 0.06$.
  • Figure 2: $Z'$ signal in StSM with 8 fb$^{-1}$ of data using an extrapolation of the sensitivity of the D0 Abazov:2005pi detector for the $\mu^+ \mu^-$ and $e^+ e^-+\gamma\gamma$ modes. The data will put a lower limit of about 600 (300) GeV on $M_{Z'}$ mass for $\epsilon =0.06 (0.02)$. Also plotted for comparison is $\sigma\cdot Br(G\to l^+ l^-)$ for the RS case.
  • Figure 3: Exclusion plots in the $\epsilon -M_{Z'}$ plane utilizing the more sensitive D0 Abazov:2005pi$e^+ e^-+\gamma\gamma$ mode with (a) the 246-275 pb$^{-1}$ of data, and (b) 8 fb$^{-1}$ of data where an extrapolation of the sensitivity curve is used. The upper dashed curve is the maximum value of $\epsilon$ allowed by Eq. (6) and the lower dashed curve corresponds to $|\Delta {\rm Pull}| <1$ (see the text for the validity of imposing the lower constraint). Cases with (without) a hidden sector are shown. Regions II, III, IV, and V are constrained by the conditions given at their respective boundaries.