We present a search for a new particle T' decaying to a top quark via T' --> t + X, where X goes undetected. We use a data sample corresponding to 5.7 fb(-1) of integrated luminosity of p (p) over bar collisions with root s = 1.96 TeV, collected at Fermilab Tevatron by the CDF II detector. Our search for pair production of T' is focused on the hadronic decay channel, p (p) over bar --> T'(T') over bar --> t (t) over bar + X (X) over bar --> bq (q) over bar (b) over bar q (q) over bar + X (X) over bar. We interpret our results in terms of a model where T' is an exotic fourth generation quark and X is a dark matter particle. The data are consistent with standard model expectations. We set a limit on the generic production of T'(T') over bar --> t (t) over bar + X (X) over bar, excluding the fourth generation exotic quarks T' at 95% confidence level up to m(T') = 400 GeV/c(2) for m(X) <= 70 GeV/c(2).

T., A., B., Á.G., S., A., D., A., A., A., A., A., et al. (2011). Search for New T' Particles in Final States with Large Jet Multiplicities and Missing Transverse Energy in p(p)over-bar Collisions at root s=1.96 TeV. PHYSICAL REVIEW LETTERS, 107(19), 191803-1-191803-7 [10.1103/PhysRevLett.107.191803].

Search for New T' Particles in Final States with Large Jet Multiplicities and Missing Transverse Energy in p(p)over-bar Collisions at root s=1.96 TeV

BARRIA, PATRIZIA;GAROSI, PAOLA;RUFFINI, FABRIZIO;SCRIBANO, ANGELO;SQUILLACIOTI, PAOLA;
2011-01-01

Abstract

We present a search for a new particle T' decaying to a top quark via T' --> t + X, where X goes undetected. We use a data sample corresponding to 5.7 fb(-1) of integrated luminosity of p (p) over bar collisions with root s = 1.96 TeV, collected at Fermilab Tevatron by the CDF II detector. Our search for pair production of T' is focused on the hadronic decay channel, p (p) over bar --> T'(T') over bar --> t (t) over bar + X (X) over bar --> bq (q) over bar (b) over bar q (q) over bar + X (X) over bar. We interpret our results in terms of a model where T' is an exotic fourth generation quark and X is a dark matter particle. The data are consistent with standard model expectations. We set a limit on the generic production of T'(T') over bar --> t (t) over bar + X (X) over bar, excluding the fourth generation exotic quarks T' at 95% confidence level up to m(T') = 400 GeV/c(2) for m(X) <= 70 GeV/c(2).
2011
T., A., B., Á.G., S., A., D., A., A., A., A., A., et al. (2011). Search for New T' Particles in Final States with Large Jet Multiplicities and Missing Transverse Energy in p(p)over-bar Collisions at root s=1.96 TeV. PHYSICAL REVIEW LETTERS, 107(19), 191803-1-191803-7 [10.1103/PhysRevLett.107.191803].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11365/41803
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