2012-12-04
13:26 |
B-physics from lattice QCD...with a twist
/ Carrasco, N (Valencia U. ; Valencia U., IFIC) ; Dimopoulos, P (Rome U.,Tor Vergata ; INFN, Rome2) ; Frezzotti, R (Rome U.,Tor Vergata ; INFN, Rome2) ; Gimenez, V (Valencia U. ; Valencia U., IFIC) ; Herdoiza, G (Madrid, Autonoma U. ; Madrid, IFT) ; Lubicz, V (Rome III U. ; INFN, Rome3) ; Martinelli, G (SISSA, Trieste ; INFN, Rome) ; Michael, C (Liverpool U., Dept. Math.) ; Palao, D (INFN, Rome2) ; Rossi, G C (Rome U.,Tor Vergata ; INFN, Rome2) et al.
We present a precise lattice QCD determination of the b-quark mass, of the B and Bs decay constants and first results for the B-meson bag parameters. For our computation we employ the so-called ratio method and our results benefit from the use of improved interpolating operators for the B-mesons. [...]
arXiv:1212.0301; IFIC-12-80; FTUAM-12-113; IFT-UAM-CSIC-12-111; RM3-TH-12-20; LTH966; CERN-PH-TH-2012-328.-
2012 - 6 p.
- Published in : PoS: ICHEP2012 (2012) , pp. 428
External link: Preprint
In : 36th International Conference on High Energy Physics, Melbourne, Australia, 4 - 11 Jul 2012, pp.428
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2012-10-04
12:54 |
Twisting all the way: from algebras to morphisms and connections
/ Aschieri, Paolo (CERN ; Piemonte Orientale U., Alessandria ; INFN, Alessandria)
Given a Hopf algebra H and an algebra A that is an H-module algebra we consider the category of left H-modules and A-bimodules, where morphisms are just right A-linear maps (not necessarily H-equivariant). Given a twist F of H we then quantize (deform) H to H^F, A to A_\star and correspondingly the category of left H-modules and A-bimodules to the category of left H^F-modules and A_\star-bimodules. [...]
arXiv:1210.1143; CERN-PH-TH-2012-064.-
2012 - 15 p.
- Published in : Int. J. Mod. Phys.: Conf. Ser.: 13 (2012) , pp. 1-19
External link: Preprint
In : Workshop of Scientific and Human Legacy of Julius Wess, Donji Milanovac, Serbia, 27 - 29 Aug 2011, pp.1-19
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2012-10-01
12:39 |
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2012-09-27
16:49 |
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2012-09-07
10:22 |
Metastable Charged Sparticles and the Cosmological Li7 Problem
/ Cyburt, Richard H (Michigan State U., JINA ; Michigan State U., NSCL) ; Ellis, John (King's Coll. London ; CERN) ; Fields, Brian D (Illinois U., Urbana (main)) ; Luo, Feng (King's Coll. London ; Minnesota U.) ; Olive, Keith A (Minnesota U.) ; Spanos, Vassilis C (Democritos Nucl. Res. Ctr.)
We consider the effects of metastable charged sparticles on Big-Bang Nucleosynthesis (BBN), including bound-state reaction rates and chemical effects. We make a new analysis of the bound states of negatively-charged massive particles with the light nuclei most prominent in BBN, and present a new code to track their abundances, paying particular attention to that of Li7. [...]
arXiv:1209.1347; KCL-PH-TH-2012-36; LCTS-2012-18; CERN-PH-TH-2012-223; UMN-TH-3117-12; FTPI-MINN-12-29.-
2012
- Published in : J. Cosmol. Astropart. Phys. 12 (2012) 037
External link: Preprint
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2012-09-05
10:02 |
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2012-09-03
09:53 |
Testing new physics with the electron g-2
/ Giudice, G F (CERN) ; Paradisi, P (CERN) ; Passera, M (INFN, Padua)
We argue that the anomalous magnetic moment of the electron (a_e) can be used to probe new physics. We show that the present bound on new-physics contributions to a_e is 8*10^-13, but the sensitivity can be improved by about an order of magnitude with new measurements of a_e and more refined determinations of alpha in atomic-physics experiments. [...]
arXiv:1208.6583; CERN-PH-TH-2012-017.-
2012
- Published in : J. High Energy Phys. 12 (2012) 113
Springer Open Access article: PDF; External link: Preprint
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2012-08-31
09:42 |
Axion-Higgs Unification
/ Redi, Michele (CERN ; INFN, Florence) ; Strumia, Alessandro (Pisa U. ; INFN, Pisa ; NICPB, Tallinn)
In theories with no fundamental scalars, one gauge group can become strong at a large scale Lambda and spontaneously break a global symmetry, producing the Higgs and the axion as composite pseudo-Nambu-Goldstone bosons. We show how KSVZ and DFSZ axion models can be naturally realised. [...]
arXiv:1208.6013; CERN-PH-TH-2012-233.-
2012 - 19 p.
- Published in : J. High Energy Phys. 11 (2012) 103
Springer Open Access article: PDF; External link: Preprint
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2012-08-30
09:37 |
A Fast Track towards the `Higgs' Spin and Parity
/ Ellis, John (King's Coll. London ; CERN) ; Hwang, Dae Sung (Sejong U.) ; Sanz, Veronica (CERN ; York U., Toronto, Dept. Phys. Astron.) ; You, Tevong (King's Coll. London ; CERN)
The LHC experiments ATLAS and CMS have discovered a new boson that resembles the long-sought Higgs boson: it cannot have spin one, and has couplings to other particles that increase with their masses, but the spin and parity remain to be determined. We show here that the `Higgs' + gauge boson invariant-mass distribution in `Higgs'-strahlung events at the Tevatron or the LHC would be very different under the J^P = 0+, 0- and 2+ hypotheses, and could provide a fast-track indicator of the `Higgs' spin and parity. [...]
arXiv:1208.6002; KCL-PH-TH-2012-38; LCTS-2012-22; CERN-PH-TH-2012-226.-
2012
- Published in : J. High Energy Phys. 11 (2012) 134
External link: Preprint
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2012-08-21
08:48 |
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