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CERN Document Server Encontrados 124 registros  1 - 10siguientefinal  ir al registro: La búsqueda tardó 0.68 segundos. 
1.
Phases of Pseudo-Nambu-Goldstone Bosons / Koutroulis, Fotis (Warsaw U.) ; McCullough, Matthew (CERN) ; Merchand, Marco (Warsaw U. ; Royal Inst. Tech., Stockholm ; Stockholm U., OKC) ; Pokorski, Stefan (Warsaw U.) ; Sakurai, Kazuki (Warsaw U.)
We study the vacuum dynamics of pseudo-Nambu-Goldstone bosons (pNGBs) for $SO(N+1) \rightarrow SO(N)$ spontaneous and explicit symmetry breaking. We determine the magnitude of explicit symmetry breaking consistent with an EFT description of the effective potential at zero and finite temperatures. [...]
arXiv:2309.15749.- 2024-05-09 - 29 p. - Published in : JHEP 2405 (2024) 095 Fulltext: 2309.15749 - PDF; document - PDF;
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2.
Goldstone Boson Decays and Chiral Anomalies / Pokorski, Stefan (Warsaw U.) ; Sakurai, Kazuki (Warsaw U.)
Martinus Veltman was the first to point out the inconsistency of the experimental value for the decay rate of $\pi^0\rightarrow\gamma\gamma$ and its calculation by J. Steinberger with the very successful concept of the pion as the (pseudo)Nambu-Goldstone boson of the spontaneously broken global axial symmetry of strong interactions. [...]
arXiv:2105.04877.- 2021 - 17 p. - Published in : Acta Phys. Pol. B 52 (2021) 651 Fulltext: document - PDF; 2105.04877 - PDF;
In : Special volume of Acta Physica Polonica B commemorating Martinus Veltman, pp.651
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3.
Correlating $\epsilon^\prime/\epsilon$ to hadronic $B$ decays via $U(2)^3$ flavour symmetry / Crivellin, Andreas (PSI, Villigen ; Zurich U.) ; Gross, Christian (INFN, Pisa ; Pisa U. ; CERN) ; Pokorski, Stefan (Warsaw U.) ; Vernazza, Leonardo (Nikhef, Amsterdam)
There are strong similarities between charge-parity (CP) violating observables in hadronic $B$ decays (in particular $\Delta A^-_{\rm CP}$ in $B\to K\pi$) and direct CP violation in Kaon decays ($\epsilon^\prime$): All these observables are very sensitive to new physics (NP) which is at the same time CP and isospin violating (i.e. NP with complex couplings which are different for up quarks and down quarks). [...]
arXiv:1909.02101; PSI-PR-19-18; UZ-TH 41/19; CERN-TH-2019-142; Nikhef/2019-041, INT-PUB-19-041; Nikhef/2019-041, INT-PUB-19-041.- 2020-01-29 - 8 p. - Published in : Phys. Rev. D 101 (2020) 015022 Article from SCOAP3: PDF; Fulltext: PDF; Published fulltext: PDF;
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4.
Three Neutrino Oscillations in Uniform Matter / Ioannisian, Ara (Yerevan Phys. Inst. ; ITPM, Yerevan) ; Pokorski, Stefan (Warsaw U.)
Following similar approaches in the past, the Schrodinger equation for three neutrino propagation in matter of constant density is solved analytically by two successive diagonalizations of 2x2 matrices. The final result for the oscillation probabilities is obtained directly in the conventional parametric form as in the vacuum but with explicit simple modification of two mixing angles ($\theta_{12}$ and $\theta_{13}$) and mass eigenvalues..
arXiv:1812.00701; CERN-TH-2018-265.- SISSA, 2018-11-15 - 4 p. - Published in : PoS ICHEP2018 (2019) 405 Fulltext: PoS(ICHEP2018)405 - PDF; 1812.00701 - PDF;
In : XXXIX International Conference on High Energy Physics, Seoul, Korea, 4 - 11 Jul 2018, pp.405
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5.
Same-sign WW scattering at the LHC: can we discover BSM effects before discovering new states? / Kalinowski, Jan (CERN ; Warsaw U.) ; Kozów, Paweł (Warsaw U.) ; Pokorski, Stefan (Warsaw U.) ; Rosiek, Janusz (Warsaw U.) ; Szleper, Michał (Warsaw, Inst. Nucl. Studies ; NCBJ, Swierk) ; Tkaczyk, Sławomir (Fermilab)
It is possible that measurements of vector boson scattering (VBS) at the LHC will reveal disagreement with Standard Model predictions, but no new particles will be observed directly. The task is then to learn as much as possible about the new physics from a VBS analysis carried within the framework of the Effective Field Theory (EFT). [...]
arXiv:1802.02366; CERN-TH-2017-269.- 2018-05-22 - 24 p. - Published in : Eur. Phys. J. C 78 (2018) 403 Article from SCOAP3: PDF; Fulltext: 1802.02366 - PDF; fermilab-pub-18-033-e - PDF;
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6.
Proton decay testing low energy SUSY / Pokorski, Stefan (Warsaw U. ; CERN) ; Rolbiecki, Krzysztof (Warsaw U.) ; Sakurai, Kazuki (Warsaw U.)
We show that gauge coupling unification in SUSY models can make a non-trivial interconnection between collider and proton decay experiments. Under the assumption of precise gauge coupling unification in the MSSM, the low energy SUSY spectrum and the unification scale are intertwined, and the lower bound on the proton lifetime can be translated into upper bounds on SUSY masses. [...]
arXiv:1707.06720; CERN-TH-2017-154.- 2018-02-28 - 6 p. - Published in : Phys. Rev. D 97 (2018) 035027 Article from SCOAP3: PDF; Fulltext: PDF; Fulltext from Publisher: PDF;
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7.
SUSY Meets Her Twin / Katz, Andrey (CERN ; Geneva U., CAP) ; Mariotti, Alberto (Brussels U., IIHE) ; Pokorski, Stefan (Warsaw U.) ; Redigolo, Diego (Tel Aviv U. ; Weizmann Inst.) ; Ziegler, Robert (Karlsruhe U., TTP)
We investigate the general structure of mirror symmetry breaking in the Twin Higgs scenario. We show, using the IR effective theory, that a significant gain in fine tuning can be achieved if the symmetry is broken hardly. [...]
arXiv:1611.08615; CERN-TH-2016-240; TTP16-054.- 2017-01-31 - 54 p. - Published in : JHEP 01 (2017) 142 Article from SCOAP3: PDF; Fulltext: PDF; Springer Open Access article: PDF;
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8.
Detecting underabundant neutralinos / Badziak, Marcin (Warsaw U.) ; Delgado, Antonio (CERN ; Notre Dame U.) ; Olechowski, Marek (Warsaw U.) ; Pokorski, Stefan (Warsaw U.) ; Sakurai, Kazuki (King's Coll. London)
The electroweak sector may play a crucial role in discovering supersymmetry. We systematically investigate the patterns of the MSSM-like electroweakinos, when the neutralino relic abundance $\Omega_\chi h^2\leq 0.12$, that is, also admitting for multi-component Dark Matter, in a broad range of the parameter space. [...]
arXiv:1506.07177; CERN-PH-TH-2015-141; KCL-PH-TH-2015-27; LCTS-2015-19; CERN-PH-TH-2015-141; KCL-PH-TH-2015-27; LCTS-2015-19.- Geneva : CERN, 2015-11-09 - 31 p. - Published in : JHEP 11 (2015) 053 Article from SCOAP3: scoap3-fulltext - PDF; scoap - PDF; Fulltext: PDF; Springer Open Access article: PDF; External link: Preprint
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9.
Lepton-flavour violating $B$ decays in generic $Z'$ models / Crivellin, Andreas (CERN) ; Hofer, Lars (Barcelona, Autonoma U.) ; Matias, Joaquim (Barcelona, Autonoma U.) ; Nierste, Ulrich (KIT, Karlsruhe, TTP) ; Pokorski, Stefan (Warsaw U.) ; Rosiek, Janusz (Warsaw U.)
LHCb has reported deviations from the SM expectations in $B\to K^* \mu^+\mu^-$ angular observables, in $B_s\to\phi\mu^+\mu^-$ and in ratio $R(K)=Br[B\to K \mu^+\mu^-]/Br[B\to K e^+e^-]$. For all three decays, a heavy neutral gauge boson mediating $b\to s\mu^+\mu^-$ transitions is a prime candidate for an explanation. [...]
arXiv:1504.07928; CERN-PH-TH-2015-091.- Geneva : CERN, 2015 - 10 p. - Published in : Phys. Rev. D 92 (2015) 054013 APS Open Access article: PDF; Fulltext: PDF; External link: Preprint
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10.
Can the differences in the determinations of $V_{ub}$ and $V_{cb}$ be explained by New Physics? / Crivellin, Andreas (CERN) ; Pokorski, Stefan (Warsaw U.)
The precise determination of the CKM elements $V_{cb}$ and $V_{ub}$ is crucial for any new physics analysis in the flavour sector. Their values can be determined from several tree-level decays: $V_{cb}$ can be extracted from $B\to D\ell\nu$ and $B\to D^*\ell\nu$ while $V_{ub}$ can be obtained from $B\to \pi\ell\nu$, $B\to \rho\ell\nu$ and $B\to\tau\nu$. [...]
arXiv:1407.1320; CERN-PH-TH-2014-124; CERN-PH-TH-2014-124.- 2015-01-07 - 5 p. - Published in : Phys. Rev. Lett. 114 (2015) 011802 APS Open Access article: PDF; Fulltext: PDF; External link: Preprint
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CERN Document Server : Encontrados 124 registros   1 - 10siguientefinal  ir al registro:
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4 Pokorski, S
9 Pokorski, S.
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