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About the rapidity and helicity distributions of the W bosons produced at LHC
/ Manca, Elisabetta (INFN, Pisa ; Pisa, Scuola Normale Superiore) ; Cerri, Olmo (INFN, Pisa ; Pisa, Scuola Normale Superiore) ; Foppiani, Nicolo (INFN, Pisa ; Pisa, Scuola Normale Superiore) ; Rolandi, Gigi (INFN, Pisa ; CERN ; Pisa, Scuola Normale Superiore)
$W$ bosons are produced at LHC from a forward-backward symmetric initial state. Their decay to a charged lepton and a neutrino has a strong spin analysing power. [...]
arXiv:1707.09344.-
2017-12-22 - 8 p.
- Published in : JHEP 12 (2017) 130
Article from SCOAP3: scoap3-fulltext - PDF; scoap - PDF; Fulltext: PDF;
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3.
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The last Complex WIMPs standing
/ Bottaro, Salvatore (Pisa, Scuola Normale Superiore ; INFN, Pisa) ; Buttazzo, Dario (INFN, Pisa) ; Costa, Marco (Pisa, Scuola Normale Superiore ; INFN, Pisa) ; Franceschini, Roberto (Rome III U. ; INFN, Rome3) ; Panci, Paolo (Pisa U. ; INFN, Pisa) ; Redigolo, Diego (CERN ; INFN, Florence) ; Vittorio, Ludovico (Pisa, Scuola Normale Superiore ; INFN, Pisa)
We continue the study of weakly interacting massive particles (WIMP) started in [arXiv:2107.09688], focusing on a single complex electroweak $n$-plet with non-zero hypercharge added to the Standard Model. The minimal splitting between the Dark Matter and its electroweak neutral partner required to circumvent direct detection constraints allows only multiplets with hypercharge smaller or equal to 1. [...]
arXiv:2205.04486; CERN-TH-2022-080.-
2022-11-05 - 28 p.
- Published in : Eur. Phys. J. C 82 (2022) 992
Fulltext: 2205.04486 - PDF; document - PDF;
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4.
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Closing the window on WIMP Dark Matter
/ Bottaro, Salvatore (Pisa, Scuola Normale Superiore ; INFN, Pisa) ; Buttazzo, Dario (INFN, Pisa) ; Costa, Marco (Pisa, Scuola Normale Superiore ; INFN, Pisa) ; Franceschini, Roberto (INFN, Rome3 ; Rome III U.) ; Panci, Paolo (INFN, Pisa ; Pisa U.) ; Redigolo, Diego (CERN ; INFN, Florence) ; Vittorio, Ludovico (Pisa, Scuola Normale Superiore ; INFN, Pisa)
We study scenarios where Dark Matter is a weakly interacting particle (WIMP) embedded in an ElectroWeak multiplet. In particular, we consider real SU(2) representations with zero hypercharge, that automatically avoid direct detection constraints from tree-level $Z$-exchange. [...]
arXiv:2107.09688.-
2022-01-12 - 28 p.
- Published in : Eur. Phys. J. C 82 (2022) 31
Fulltext: 2107.09688 - PDF; document - PDF;
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5.
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Quark masses, CKM angles and Lepton Flavour Universality violation
/ Barbieri, Riccardo (Pisa, Scuola Normale Superiore ; INFN, Pisa) ; Ziegler, Robert (CERN)
A properly defined and suitably broken $U(2)$ flavour symmetry leads to successful quantitative relations between quark mass ratios and CKM angles. At the same time the intrinsic distinction introduced by $U(2)$ between the third and the first two families of quarks and leptons may support anomalies in charged and neutral current semi-leptonic $B$-decays of the kind tentatively observed in current flavour experiments. [...]
arXiv:1904.04121; CERN-TH-2019-041.-
2019-07-04 - 19 p.
- Published in : JHEP 1907 (2019) 023
Article from SCOAP3: scoap3-fulltext - PDF; scoap - PDF; Fulltext: PDF;
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Investigating the near-criticality of the Higgs boson
/ Buttazzo, Dario (CERN ; Pisa, Scuola Normale Superiore ; INFN, Pisa) ; Degrassi, Giuseppe (INFN, Rome3 ; Rome III U.) ; Giardino, Pier Paolo (Pisa U. ; CERN ; INFN, Pisa) ; Giudice, Gian F. (CERN) ; Sala, Filippo (Pisa, Scuola Normale Superiore ; INFN, Pisa ; LBNL, Berkeley) ; Salvio, Alberto (Pisa, Scuola Normale Superiore ; INFN, Pisa ; Madrid, Autonoma U. ; Madrid, IFT) ; Strumia, Alessandro (Pisa U. ; INFN, Pisa)
We extract from data the parameters of the Higgs potential, the top Yukawa coupling and the electroweak gauge couplings with full 2-loop NNLO precision, and we extrapolate the SM parameters up to large energies with full 3-loop NNLO RGE precision. Then we study the phase diagram of the Standard Model in terms of high-energy parameters, finding that the measured Higgs mass roughly corresponds to the minimum values of the Higgs quartic and top Yukawa and the maximum value of the gauge couplings allowed by vacuum metastability. [...]
arXiv:1307.3536; CERN-PH-TH-2013-166; FTUAM-13-20; IFT-UAM-CSIC-13-081; IFUP-TH; CERN-PH-TH-2013-166; FTUAM-13-20; IFT-UAM-CSIC-13-081.-
2013 - 49 p.
- Published in : JHEP 12 (2013) 089
Fulltext: PDF; Springer Open Access article: PDF; External link: Preprint
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8.
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Stable wormholes in scalar-tensor theories
/ Franciolini, Gabriele (Geneva U., CAP ; CERN) ; Hui, Lam (Columbia U.) ; Penco, Riccardo (Carnegie Mellon U.) ; Santoni, Luca (Columbia U.) ; Trincherini, Enrico (Pisa, Scuola Normale Superiore ; INFN, Pisa)
We reconsider the issue of whether scalar-tensor theories can admit stable wormhole configurations supported by a non-trivial radial profile for the scalar field. Using a recently proposed effective theory for perturbations around static, spherically symmetric backgrounds, we show that scalar-tensor theories of "beyond Horndeski" type can have wormhole solutions that are free of ghost and gradient instabilities. [...]
arXiv:1811.05481.-
2019-01-30 - 18 p.
- Published in : JHEP 01 (2019) 221
Article from SCOAP3: scoap3-fulltext - PDF; scoap - PDF; Fulltext: PDF;
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9.
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Real-time reconstruction of long-lived particles at LHCb using FPGAs
/ Cenci, Riccardo (INFN, Pisa ; Pisa, Scuola Normale Superiore) ; Di Luca, Andrea (INFN, Pisa ; Pisa U.) ; Lazzari, Federico (INFN, Pisa ; Siena U.) ; Morello, Michael J. (INFN, Pisa ; Pisa, Scuola Normale Superiore) ; Punzi, Giovanni (INFN, Pisa ; Pisa U.)
/LHCb Collaboration
Finding tracks downstream of the magnet at the earliest LHCb trigger level is not part of the baseline plan of the upgrade trigger, on account of the significant CPU time required to execute the search. Many long-lived particles, such as $K^0_S$ and strange baryons, decay after the vertex track detector, so that their reconstruction efficiency is limited. [...]
arXiv:2006.11067.-
2020-07-08 - 7 p.
- Published in : J. Phys.: Conf. Ser. 1525 (2020) 012101
Fulltext: J Phys Conf Ser 1525 012101 - PDF; 2006.11067 - PDF;
In : 19th International Workshop on Advanced Computing and Analysis Techniques in Physics Research, Saas Fee, Switzerland, 11 - 15 Mar 2019, pp.012101
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Towards a Muon Collider
/ Accettura, Carlotta (CERN) ; Adams, Dean (Rutherford) ; Agarwal, Rohit (UC, Berkeley (main)) ; Ahdida, Claudia (CERN) ; Aimè, Chiara (Pavia U. ; INFN, Pavia) ; Amapane, Nicola (INFN, Turin ; Turin U.) ; Amorim, David (CERN) ; Andreetto, Paolo (INFN, Padua) ; Anulli, Fabio (INFN, Rome) ; Appleby, Robert (Manchester U.) et al.
A muon collider would enable the big jump ahead in energy reach that is needed for a fruitful exploration of fundamental interactions. The challenges of producing muon collisions at high luminosity and 10 TeV centre of mass energy are being investigated by the recently-formed International Muon Collider Collaboration. [...]
arXiv:2303.08533; FERMILAB-PUB-23-123-AD-PPD-T.-
2023-09-26 - 118 p.
- Published in : Eur. Phys. J. C
- Published in : Eur. Phys. J. C
Fulltext: 2303.08533 - PDF; FERMILAB-PUB-23-123-AD-PPD-T - PDF; Fulltext from Publisher: PDF; External links: JLab Document Server; Fermilab Library Server
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