Please use this identifier to cite or link to this item: http://localhost:80/handle/1956/6380
Title: A method to estimate the boson mass and to optimise sensitivity to helicity correlations of tau+tau final states
Publisher: Springer Verlag
Description: In proton-proton collisions at LHC energies, Z0 and low mass Higgs bosons would be produced with high and predominantly longitudinal boost with respect to the beam axis. This note describes a new analysis tool devised to handle this situation in cases when such bosons decay to a pair of τ -leptons. The tool reconstructs the rest frame of the τ+τ− pair by finding the boost that minimises the acollinearity between the visible τ decay products. In most cases this gives a reasonable approximation to the rest frame of the decaying boson. It is shown how the reconstructed rest frame allows for a new method of mass estimation. Also a considerable gain in sensitivity to helicity correlations is obtained by analysing the τ -jets in the reconstructed frame instead of using the laboratory momenta and energies, particularly when both τ -leptons decay hadronically.
Journal Article
publishedVersion
URI: http://localhost:80/handle/1956/6380
More Information: Journal of High Energy Physics 2012:43
1029-8479
http://hdl.handle.net/1956/6380
927660
10.1007/jhep01(2012)043
Appears in Collections:Department of Earth Science

Files in This Item:
Click on the URI links for accessing contents.
Title: A method to estimate the boson mass and to optimise sensitivity to helicity correlations of tau+tau final states
Publisher: Springer Verlag
Description: In proton-proton collisions at LHC energies, Z0 and low mass Higgs bosons would be produced with high and predominantly longitudinal boost with respect to the beam axis. This note describes a new analysis tool devised to handle this situation in cases when such bosons decay to a pair of τ -leptons. The tool reconstructs the rest frame of the τ+τ− pair by finding the boost that minimises the acollinearity between the visible τ decay products. In most cases this gives a reasonable approximation to the rest frame of the decaying boson. It is shown how the reconstructed rest frame allows for a new method of mass estimation. Also a considerable gain in sensitivity to helicity correlations is obtained by analysing the τ -jets in the reconstructed frame instead of using the laboratory momenta and energies, particularly when both τ -leptons decay hadronically.
Journal Article
publishedVersion
URI: http://localhost:80/handle/1956/6380
More Information: Journal of High Energy Physics 2012:43
1029-8479
http://hdl.handle.net/1956/6380
927660
10.1007/jhep01(2012)043
Appears in Collections:Department of Earth Science

Files in This Item:
Click on the URI links for accessing contents.
Title: A method to estimate the boson mass and to optimise sensitivity to helicity correlations of tau+tau final states
Publisher: Springer Verlag
Description: In proton-proton collisions at LHC energies, Z0 and low mass Higgs bosons would be produced with high and predominantly longitudinal boost with respect to the beam axis. This note describes a new analysis tool devised to handle this situation in cases when such bosons decay to a pair of τ -leptons. The tool reconstructs the rest frame of the τ+τ− pair by finding the boost that minimises the acollinearity between the visible τ decay products. In most cases this gives a reasonable approximation to the rest frame of the decaying boson. It is shown how the reconstructed rest frame allows for a new method of mass estimation. Also a considerable gain in sensitivity to helicity correlations is obtained by analysing the τ -jets in the reconstructed frame instead of using the laboratory momenta and energies, particularly when both τ -leptons decay hadronically.
Journal Article
publishedVersion
URI: http://localhost:80/handle/1956/6380
More Information: Journal of High Energy Physics 2012:43
1029-8479
http://hdl.handle.net/1956/6380
927660
10.1007/jhep01(2012)043
Appears in Collections:Department of Earth Science

Files in This Item:
Click on the URI links for accessing contents.