What Next: pagina del gruppo di lavoro "Standard Model"

Lista contributi

11. A two parameters fit of lepton and quark masses

Prof. Federico Palmonari (INFN & University, Bologna)

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In the three charged fermion families of the Standard Model, the mass ratios between $2^{nd}$ and $1^{st}$, $3^{rd}$ and $2^{nd}$ generations can be approximated by power laws of the integer numbers 3, 4 and 7 with integer exponents which are function of their generation index i=1, 2, 3. Each recursive formula is extended to i=0 and this mass value is used as a free parameter to fit the...

6. HE-LHC

Giorgio Chiarelli (PI)

I believe that the scenario for "What Next" in the SM group (and not only) should include the possibility to push for HE-LHC as an alternative to other paths.

5. New Physics signals from measurable polarization asymmetries at LHC

Giancarlo Panizzo (U)

We propose a new type of Z polarization asymmetry in bottom-Z production at LHC that should be realistically measurable and would provide the determination of the so-called Ab parameter, whose available measured value still appears to be in disagreement with the Standard Model prediction. This polarization can be measured independently of a possible existence of Supersymmetry. If Supersymmetry...

14. Physics at the ILC

Barbara Mele (ROMA1)

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We discuss a few major physics topics where an energy-frontier e+e− collider can contribute beyond the expected reach of the LHC. We focus on precision measurements in the Higgs-boson and top-quark sectors at the International Linear Collider (ILC), an e+e− accelerator featuring a c.o.m. energy ranging from 250 GeV up to 500 GeV, and possibly 1 TeV, at different stages, with luminosities of a...

4. Precise measurement of hadronic cross section at low energy for alpha_em(M_Z0) and (g-2)_mu

Dr. Graziano Venanzoni (LNF)

For the precision test of the Standard Model at future e+e- colliders (like TLEP or ILC), as well as for the reduction of the theoretical error of the Muon (g-2), an improvement on the knowledge of the low energy non perturbative effects is mandatory. These effects to alpha_em(M_Z0) and to (g-2)_mu can be obtained by precise measurements of the hadronic cross sections at low e+e- machine...

3. Projected improvement of the accuracy of top-quark mass measurements at the upgraded LHC

Collaboration CMS (CERN)

Estimates of the ultimate precision of measurements of the top-quark mass achievable with 300–3000 fb−1 of proton-proton collisions at a center-of-mass energy of 14 TeV are presented. Possible improvements in the understanding of systematic uncertain- ties are discussed for various top-quark mass measurement techniques. Building on new insights from recent studies at the LHC, the...

8. Projected Performance of an Upgraded CMS Detector at the LHC and HL-LHC: Contribution to the Snowmass Process

Fabio Cossutti (TS on behalf of the CMS Collaboration)

The physics reach of the CMS detector achievable with 300(0)/fb of proton-proton collisions recorded at sqrt(s) = 14TeV is presented. Ultimate precision on measurements of Higgs boson properties, top quark physics, and electroweak processes are discussed, as well as the discovery potential for new particles beyond the standard model. In addition, the potential for future heavy ion physics is...

9. Projections for measurements of Higgs boson cross sections, branching ratios and coupling parameters with the ATLAS detector at a HL-LHC

Collaboration ATLAS (_)

Studies are presented on the prospects for measuring Higgs boson production cross sec- tions times branching ratios, and determining couplings to individual fermions and bosons in 14 TeV proton-proton collisions at the LHC with 300 fb−1 and at the HL-LHC with 3000 fb−1. Several studies already presented at the 2012 European Strategy meeting are updated. In addition first analyses are presented...

2. Projections for Top FCNC Searches in 3000 fb−1 at the LHC

Collaboration CMS (CERN)

Searches for t → Zq in top-quark pair events with a topology compatible with the decay chain tt → Zq + Wb → llq + l′ νb (l = e, μ) are presented. Projections on ex- clusion limits with luminosities of 300 fb−1 and 3000 fb−1 of proton-proton collisions at a center-of-mass energy of 14 TeV are considered.

10. Prospects for measurements of the HZZ vertex tensor structure in H → ZZ∗ → 4l decay channel with ATLAS

Collaboration ATLAS (_)

In this note, the prospects for experimental studies of the general HVV tensor coupling using the H → ZZ∗ → 4l decay are presented. The sensitivity of the ATLAS experi- ment to non-Standard Model contributions to the HZZ vertex is estimated for 300 fb−1 and 3000 fb−1 of LHC data at √s = 14 TeV. The exclusion limits on the non-Standard Model CP-even coupling g2 and CP-odd coupling g4, given the...

13. Prospettive per le future analisi di fisica a LHC

Paolo Nason (MIB)

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Breve nota sulle future analisi a LHC

1. Testing special relativity through decay of high energy particle

Dr. paolo walter cattaneo (INFN Pavia)

An important test of the special relativity theory consists in verifying two key predictions: the relative widths of unstable particles are independent from their Lorentz boost and their laboratory lifetimes is proportional to the boost parameter $\gamma$. These predictions can be subject to experimental tests measuring lifetimes and branching rations of unstable particle in flight at...

15. Top pair production at an e+e- collider from a composite Higgs scenario

Stefania De Curtis (FI)

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The top quark plays a central role in many New Physics (NP) models, and in understanding the details of EWSB. In the short and mid-term future, top quark studies will be mainly driven by the LHC experiments. Exploration of top quarks will, however, be an integral part of particle physics studies at any future facility. An e+e− collider will have a rich top-quark physics program mainly in two...

7. Vector Boson Scattering and Quartic Gauge Coupling Studies in WZ Production at 14 TeV

Fabio Cossutti (TS on behalf of the CMS Collaboration)

Studies of the pp -> WZjj vector boson scattering process in 14 TeV pp collisions using upgraded CMS detector configurations are presented. These studies include assessments of the discovery potential for observing longitudinal vector boson scattering for luminosities up to 300/fb and for observing anomalous quartic gauge couplings with luminosities of 300/fb and 3000/fb.

12. Verifica del Mofello Standard tramite la misura della Asimmetria Violante la Parità (APV

Dr. Guido Maria Urciuoli (INFN Sezione di Roma)

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Una classe di esperimenti che hanno la potenzialità di effettuare verifiche molte precise del Modello Standard. Si tratta degli esperimenti che misurano la Asimmetria Violante la Parità (APV) nella diffusione di elettroni su nuclei e nucleoni. L’elettrone interagisce con la materia tramite interazione elettrodebole. La parte elettromagnetica di questa interazione è, come ben noto,...