Limits...
Physics at the [Formula: see text] linear collider.

Moortgat-Pick G, Baer H, Battaglia M, Belanger G, Fujii K, Kalinowski J, Heinemeyer S, Kiyo Y, Olive K, Simon F, Uwer P, Wackeroth D, Zerwas PM, Arbey A, Asano M, Bagger J, Bechtle P, Bharucha A, Brau J, Brümmer F, Choi SY, Denner A, Desch K, Dittmaier S, Ellwanger U, Englert C, Freitas A, Ginzburg I, Godfrey S, Greiner N, Grojean C, Grünewald M, Heisig J, Höcker A, Kanemura S, Kawagoe K, Kogler R, Krawczyk M, Kronfeld AS, Kroseberg J, Liebler S, List J, Mahmoudi F, Mambrini Y, Matsumoto S, Mnich J, Mönig K, Mühlleitner MM, Pöschl R, Porod W, Porto S, Rolbiecki K, Schmitt M, Serpico P, Stanitzki M, Stål O, Stefaniak T, Stöckinger D, Weiglein G, Wilson GW, Zeune L, Moortgat F, Xella S, Bagger J, Brau J, Ellis J, Kawagoe K, Komamiya S, Kronfeld AS, Mnich J, Peskin M, Schlatter D, Wagner A, Yamamoto H - Eur Phys J C Part Fields (2015)

Bottom Line: A comprehensive review of physics at an [Formula: see text] linear collider in the energy range of [Formula: see text] GeV-3 TeV is presented in view of recent and expected LHC results, experiments from low-energy as well as astroparticle physics.The report focusses in particular on Higgs-boson, top-quark and electroweak precision physics, but also discusses several models of beyond the standard model physics such as supersymmetry, little Higgs models and extra gauge bosons.The connection to cosmology has been analysed as well.

View Article: PubMed Central - PubMed

Affiliation: II. Institute of Theoretical Physics, University of Hamburg, 22761 Hamburg, Germany ; Deutsches Elektronen Synchrotron (DESY), Hamburg und Zeuthen, 22603 Hamburg, Germany.

ABSTRACT

A comprehensive review of physics at an [Formula: see text] linear collider in the energy range of [Formula: see text] GeV-3 TeV is presented in view of recent and expected LHC results, experiments from low-energy as well as astroparticle physics. The report focusses in particular on Higgs-boson, top-quark and electroweak precision physics, but also discusses several models of beyond the standard model physics such as supersymmetry, little Higgs models and extra gauge bosons. The connection to cosmology has been analysed as well.

No MeSH data available.


(Upper plot) cross section for  at  GeV normalised by that of the SM as a function of the self-coupling normalised by that of the SM. (Lower plot) a similar plot for  at  TeV
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Fig49: (Upper plot) cross section for at  GeV normalised by that of the SM as a function of the self-coupling normalised by that of the SM. (Lower plot) a similar plot for at  TeV

Mentions: Even more interesting is the measurement of the trilinear Higgs self-coupling, since it is to observe the force that makes the Higgs boson condense in the vacuum, which is an unavoidable step to uncover the secret of the EW symmetry breaking. In other words, we need to measure the shape of the Higgs potential. There are two ways to measure the tri-linear Higgs self-coupling. The first method is to use the double Higgs-strahlung process: and the second is by the double Higgs production via WW-fusion: . The first process attains its cross section maximum at around  GeV, while the second is negligible there but starts to dominate at energies above  TeV, as seen in Fig. 47. In any case the signal cross sections are very small (0.2 fb or less) and as seen in Fig. 48 irreducible background diagrams containing no self-coupling dilute the contribution from the self-coupling diagram, thereby degrading the sensitivity to the self-coupling, even if we can control the relatively huge SM backgrounds from , WWZ, ZZ, , ZZZ, and ZZh. See Fig. 49 for the sensitivity factors for at  GeV and at  TeV, which are 1.66 (1.80) and 0.76 (0.85), respectively, with (without) weighting to enhance the contribution from the signal diagram. Notice that if there were no background diagrams, the sensitivity factor would be 0.5. The self-coupling measurement is very difficult even in the clean environment of the ILC and requires a new flavour tagging algorithm that precedes jet-clustering, sophisticated neural-net-based data selection, and the event weighting technique [79, 186–191]. The current state of the art for the Zhh data selection is summarised in Table 10.Fig. 47


Physics at the [Formula: see text] linear collider.

Moortgat-Pick G, Baer H, Battaglia M, Belanger G, Fujii K, Kalinowski J, Heinemeyer S, Kiyo Y, Olive K, Simon F, Uwer P, Wackeroth D, Zerwas PM, Arbey A, Asano M, Bagger J, Bechtle P, Bharucha A, Brau J, Brümmer F, Choi SY, Denner A, Desch K, Dittmaier S, Ellwanger U, Englert C, Freitas A, Ginzburg I, Godfrey S, Greiner N, Grojean C, Grünewald M, Heisig J, Höcker A, Kanemura S, Kawagoe K, Kogler R, Krawczyk M, Kronfeld AS, Kroseberg J, Liebler S, List J, Mahmoudi F, Mambrini Y, Matsumoto S, Mnich J, Mönig K, Mühlleitner MM, Pöschl R, Porod W, Porto S, Rolbiecki K, Schmitt M, Serpico P, Stanitzki M, Stål O, Stefaniak T, Stöckinger D, Weiglein G, Wilson GW, Zeune L, Moortgat F, Xella S, Bagger J, Brau J, Ellis J, Kawagoe K, Komamiya S, Kronfeld AS, Mnich J, Peskin M, Schlatter D, Wagner A, Yamamoto H - Eur Phys J C Part Fields (2015)

(Upper plot) cross section for  at  GeV normalised by that of the SM as a function of the self-coupling normalised by that of the SM. (Lower plot) a similar plot for  at  TeV
© Copyright Policy - OpenAccess
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4537698&req=5

Fig49: (Upper plot) cross section for at  GeV normalised by that of the SM as a function of the self-coupling normalised by that of the SM. (Lower plot) a similar plot for at  TeV
Mentions: Even more interesting is the measurement of the trilinear Higgs self-coupling, since it is to observe the force that makes the Higgs boson condense in the vacuum, which is an unavoidable step to uncover the secret of the EW symmetry breaking. In other words, we need to measure the shape of the Higgs potential. There are two ways to measure the tri-linear Higgs self-coupling. The first method is to use the double Higgs-strahlung process: and the second is by the double Higgs production via WW-fusion: . The first process attains its cross section maximum at around  GeV, while the second is negligible there but starts to dominate at energies above  TeV, as seen in Fig. 47. In any case the signal cross sections are very small (0.2 fb or less) and as seen in Fig. 48 irreducible background diagrams containing no self-coupling dilute the contribution from the self-coupling diagram, thereby degrading the sensitivity to the self-coupling, even if we can control the relatively huge SM backgrounds from , WWZ, ZZ, , ZZZ, and ZZh. See Fig. 49 for the sensitivity factors for at  GeV and at  TeV, which are 1.66 (1.80) and 0.76 (0.85), respectively, with (without) weighting to enhance the contribution from the signal diagram. Notice that if there were no background diagrams, the sensitivity factor would be 0.5. The self-coupling measurement is very difficult even in the clean environment of the ILC and requires a new flavour tagging algorithm that precedes jet-clustering, sophisticated neural-net-based data selection, and the event weighting technique [79, 186–191]. The current state of the art for the Zhh data selection is summarised in Table 10.Fig. 47

Bottom Line: A comprehensive review of physics at an [Formula: see text] linear collider in the energy range of [Formula: see text] GeV-3 TeV is presented in view of recent and expected LHC results, experiments from low-energy as well as astroparticle physics.The report focusses in particular on Higgs-boson, top-quark and electroweak precision physics, but also discusses several models of beyond the standard model physics such as supersymmetry, little Higgs models and extra gauge bosons.The connection to cosmology has been analysed as well.

View Article: PubMed Central - PubMed

Affiliation: II. Institute of Theoretical Physics, University of Hamburg, 22761 Hamburg, Germany ; Deutsches Elektronen Synchrotron (DESY), Hamburg und Zeuthen, 22603 Hamburg, Germany.

ABSTRACT

A comprehensive review of physics at an [Formula: see text] linear collider in the energy range of [Formula: see text] GeV-3 TeV is presented in view of recent and expected LHC results, experiments from low-energy as well as astroparticle physics. The report focusses in particular on Higgs-boson, top-quark and electroweak precision physics, but also discusses several models of beyond the standard model physics such as supersymmetry, little Higgs models and extra gauge bosons. The connection to cosmology has been analysed as well.

No MeSH data available.