CERN Accelerating science

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1.
Extra U(1) as natural source of a monochromatic gamma ray line / Dudas, Emilian (CERN ; Ecole Polytechnique, CPHT) ; Mambrini, Yann (Orsay, LPT) ; Pokorski, Stefan (Warsaw U. ; TUM-IAS, Munich) ; Romagnoni, Alberto (Madrid, IFT ; Madrid, Autonoma U.)
Extensions of the Standard Model with an extra U'(1) abelian group generically generate terms coming from loops of heavy fermions, leading to three gauge boson couplings, in particular Z'Z gamma. We show that WMAP data constrains the gauge coupling of the group g_D to values comparable with the electro-weak ones, rather independently of the mass of Z'. [...]
arXiv:1205.1520; CERN-PH-TH-2012-109; CPHT-RR-018.0512; FTUAM-12-90; IFT-UAM-CSIC-12-37; LPT-ORSAY-12-39; CERN-PH-TH-2012-109.- 2012 - 6 p. - Published in : JHEP 10 (2012) 123 Fulltext: PDF; Springer Open Access article: PDF; External link: Preprint
2.
A semi-infinite matrix analysis of the BFKL equation / Bethencourt de León, N. (Madrid, IFT) ; Chachamis, G. (LIP, Lisbon) ; Romagnoni, Alberto (Madrid, IFT ; Madrid, Autonoma U.) ; Sabio Vera, Agustin (Madrid, IFT ; Madrid, Autonoma U. ; CERN)
A new mapping between the BFKL equation and Beisert's representation of the XXX Heisenberg ferromagnet with spin s = - 1/2 is given. The action of the Hamiltonian operator of a spin chain with SL(2) invariance on a symmetric double copy of a harmonic oscillator excited state is shown to be identical to the action of the BFKL Hamiltonian on the gluon Green function for the azimuthal-angle averaged forward scattering case. [...]
arXiv:1111.4553; CERN-TH-2020-064.- 2020-06-17 - 13 p. - Published in : Eur. Phys. J. C 80 (2020) 549 Article from SCOAP3: scoap3-fulltext - PDF; scoap - PDF; Fulltext: arXiv:1111.4553 - PDF; 1111.4553 - PDF; Fulltext from Publisher: PDF;
3.
Covariant quantization of $N$ = ½ SYM theories and supergauge invariance / Penati, Silvia ; Romagnoni, Alberto
2005 - Published in : JHEP 02 (2005) 064

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