Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2008-09-17
Phys.Rev.D78:095002,2008
Physics
High Energy Physics
High Energy Physics - Phenomenology
13 pages, 4 figures
Scientific paper
10.1103/PhysRevD.78.095002
In many theories of physics beyond the Standard Model, from extra dimensions to Hidden Valleys and models of dark matter, Z' bosons mediate between Standard Model particles and hidden sector states. We study the feasibility of observing such hidden states through an invisibly decaying Z' at the LHC. We focus on the process pp -> \gamma Z' -> \gamma X X*, where X is any neutral, (quasi-) stable particle, whether a Standard Model (SM) neutrino or a new state. This complements a previous study using pp -> Z Z' -> l+ l- X X*. Only the Z' mass and two effective charges are needed to describe this process. If the Z' decays invisibly only to Standard Model neutrinos, then these charges are predicted by observation of the Z' through the Drell-Yan process, allowing discrimination between Z' decays to SM neutrinos and invisible decays to new states. We carefully discuss all backgrounds and systematic errors that affect this search. We find that hidden sector decays of a 1 TeV Z' can be observed at 5 sigma significance with 50 fb^{-1} at the LHC. Observation of a 1.5 TeV state requires super-LHC statistics of 1 ab^{-1}. Control of the systematic errors, in particular the parton distribution function uncertainty of the dominant Z \gamma background, is crucial to maximize the LHC search
Gershtein Yuri
Petriello Frank
Quackenbush Seth
Zurek Kathryn M.
No associations
LandOfFree
Discovering hidden sectors with mono-photon Z' searches does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Discovering hidden sectors with mono-photon Z' searches, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Discovering hidden sectors with mono-photon Z' searches will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-661296