|
| |
|
|
Studium difrakčních procesů na experimentu ATLAS
Kůs, Vlastimil ; Taševský, Marek (advisor) ; Valkárová, Alice (referee)
The chapter of forward and diraction physics is an indispensable and always a rich part of the physics menu of any experiment at high-energy accelerators. In last years, a big eort was put to study and estimate the feasibility or a discovery potential of Higgs boson produced in the central exclusive diraction events at LHC. These processes have a chance to become competitive or complementary to the program of the Higgs boson search in standard (non-diraction) processes, in particular in the supersymmetric extension of the Standard model. In this thesis an analysis of the central exclusive production of Higgs boson decaying to two tau leptons is performed, along with investigations of corresponding background processes.
|
|
|
Study of diffractive processes at the ATLAS Experiment
Kůs, Vlastimil
Title: Study of diffractive processes at the ATLAS Experiment Author: Vlastimil Kůs Department: Institute of Particle and Nuclear Physics Supervisor: Mgr. Marek Taševský, Ph.D. Institute of Physics of the Academy of Sciences of the CR, v.v.i. Abstract: A data sample of pp collisions corresponding to an integrated lumi- nosity of 6.75 nb−1 was collected at √ s = 7 TeV using the ATLAS detector at the Large Hadron Collider. Collision events with at least two jets with pT > 20 GeV are used to measure the differential cross section of the diffractive dijet production as a function of the rapidity gap size ∆ηF , the largest forward region extending from |η| = 4.8 devoid of particle activity above threshold momentum cuts, and an estimator of the fractional momentum loss of the scattered proton assuming the single diffractive dissociation (pp → pX), ˜ξ± . Comparisons with various Monte Carlo models reveal that though the region of small ˜ξ± and large rapidity gaps is dominated by diffraction, a contribution form non-diffractive events cannot be neglected. The rapidity gap survival probability is estimated based on data to Monte Carlo comparisons in the −3.2 < log10 ˜ξ± < −2.5 region of the ˜ξ± distri- bution with the ∆ηF > 2 requirement. 1
|
|
|
Study of diffractive processes at the ATLAS Experiment
Kůs, Vlastimil
Title: Study of diffractive processes at the ATLAS Experiment Author: Vlastimil Kůs Department: Institute of Particle and Nuclear Physics Supervisor: Mgr. Marek Taševský, Ph.D. Institute of Physics of the Academy of Sciences of the CR, v.v.i. Abstract: A data sample of pp collisions corresponding to an integrated lumi- nosity of 6.75 nb−1 was collected at √ s = 7 TeV using the ATLAS detector at the Large Hadron Collider. Collision events with at least two jets with pT > 20 GeV are used to measure the differential cross section of the diffractive dijet production as a function of the rapidity gap size ∆ηF , the largest forward region extending from |η| = 4.8 devoid of particle activity above threshold momentum cuts, and an estimator of the fractional momentum loss of the scattered proton assuming the single diffractive dissociation (pp → pX), ˜ξ± . Comparisons with various Monte Carlo models reveal that though the region of small ˜ξ± and large rapidity gaps is dominated by diffraction, a contribution form non-diffractive events cannot be neglected. The rapidity gap survival probability is estimated based on data to Monte Carlo comparisons in the −3.2 < log10 ˜ξ± < −2.5 region of the ˜ξ± distri- bution with the ∆ηF > 2 requirement. 1
|
|
|
Study of diffractive processes at the ATLAS Experiment
Kůs, Vlastimil ; Taševský, Marek (advisor) ; Royon, Christophe (referee) ; Valkárová, Alice (referee)
Title: Study of diffractive processes at the ATLAS Experiment Author: Vlastimil Kůs Department: Institute of Particle and Nuclear Physics Supervisor: Mgr. Marek Taševský, Ph.D. Institute of Physics of the Academy of Sciences of the CR, v.v.i. Abstract: A data sample of pp collisions corresponding to an integrated lumi- nosity of 6.75 nb−1 was collected at √ s = 7 TeV using the ATLAS detector at the Large Hadron Collider. Collision events with at least two jets with pT > 20 GeV are used to measure the differential cross section of the diffractive dijet production as a function of the rapidity gap size ∆ηF , the largest forward region extending from |η| = 4.8 devoid of particle activity above threshold momentum cuts, and an estimator of the fractional momentum loss of the scattered proton assuming the single diffractive dissociation (pp → pX), ˜ξ± . Comparisons with various Monte Carlo models reveal that though the region of small ˜ξ± and large rapidity gaps is dominated by diffraction, a contribution form non-diffractive events cannot be neglected. The rapidity gap survival probability is estimated based on data to Monte Carlo comparisons in the −3.2 < log10 ˜ξ± < −2.5 region of the ˜ξ± distri- bution with the ∆ηF > 2 requirement. 1
|
|
| |
|
|
Studium difrakčních procesů na experimentu ATLAS
Kůs, Vlastimil ; Valkárová, Alice (referee) ; Taševský, Marek (advisor)
The chapter of forward and diraction physics is an indispensable and always a rich part of the physics menu of any experiment at high-energy accelerators. In last years, a big eort was put to study and estimate the feasibility or a discovery potential of Higgs boson produced in the central exclusive diraction events at LHC. These processes have a chance to become competitive or complementary to the program of the Higgs boson search in standard (non-diraction) processes, in particular in the supersymmetric extension of the Standard model. In this thesis an analysis of the central exclusive production of Higgs boson decaying to two tau leptons is performed, along with investigations of corresponding background processes.
|
guest ::
RSS feed.