1.
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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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2.
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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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3.
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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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4.
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5.
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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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6.
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Real-time cluster finding for LHCb silicon pixel VELO detector using FPGA
/ Lazzari, Federico (U. Siena (main) ; INFN, Pisa) ; Bassi, Giovanni (INFN, Pisa ; Pisa, Scuola Normale Superiore) ; Cenci, Riccardo (INFN, Pisa ; Pisa, Scuola Normale Superiore) ; Morello, Michael J (INFN, Pisa ; Pisa, Scuola Normale Superiore) ; Punzi, Giovanni (INFN, Pisa ; Pisa U.)
In the Run-3 of LHCb, the High Level Trigger will have to process events at full LHC collision rate (30 MHz). This is a very challenging goal, and delegating some low-level tasks to FPGA accelerators can be very helpful by saving precious computing time. [...]
2020 - 6 p.
- Published in : J. Phys.: Conf. Ser. 1525 (2020) 012044
In : 19th International Workshop on Advanced Computing and Analysis Techniques in Physics Research, Saas Fee, Switzerland, 11 - 15 Mar 2019, pp.012044
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7.
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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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9.
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Local multiboson factorization of the quark determinant
/ Cè, Marco (Helmholtz Inst., Mainz ; INFN, Pisa ; Pisa, Scuola Normale Superiore) ; Giusti, Leonardo (CERN ; INFN, Milan Bicocca ; Milan Bicocca U.) ; Schaefer, Stefan (DESY, Zeuthen ; NIC, Zeuthen)
We discuss the recently proposed multiboson domain-decomposed factorization of the gauge-field dependence of the fermion determinant in lattice QCD. In particular, we focus on the case of a lattice divided in an arbitrary number of thick time slices. [...]
arXiv:1711.01592; HIM-2017-06; CERN-TH-2017-221; DESY-17-167; HIM-2017-06; CERN-TH-2017-221; DESY-17-167.-
2018 - 8 p.
- Published in : EPJ Web Conf. 175 (2018) 11005
Fulltext: epjconf_lattice2018_11005 - PDF; 1711.01592 - PDF; Preprint: PDF;
In : 35th International Symposium on Lattice Field Theory, Granada, Spain, 18 - 24 Jun 2017, pp.11005
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10.
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Results on Multiple Coulomb Scattering from 12 and 20 GeV electrons on Carbon targets
/ MUonE Collaboration
Multiple scattering effects of 12 and 20 GeV electrons on 8 and 20 mm thickness carbon targets have been studied with high-resolution silicon microstrip detectors of the UA9 apparatus at the H8 line at CERN. Comparison of the scattering angle between data and GEANT4 simulation shows excellent agreement in the core of the distributions leaving some residual disagreement in the tails..
arXiv:1905.11677.-
2020-01-16 - 15 p.
- Published in : JINST 15 (2020) P01017
Fulltext: PDF;
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