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CERN Preprints

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2020-07-01
16:57
Observation of structure in the $J/\psi$-pair mass spectrum
Using proton-proton collision data at centre-of-mass energies of $\sqrt{s} = 7$, $8$ and $13\mathrm{\,TeV}$ recorded by the LHCb experiment at the Large Hadron Collider, corresponding to an integrated luminosity of $9\mathrm{\,fb}^{-1}$, the invariant mass spectrum of $J/\psi$ pairs is studied. [...]
CERN-EP-2020-115 ; LHCB-PAPER-2020-011.
- 2020.
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2020-07-01
04:19
Split SIMPs with Decays / Katz, Andrey ; Salvioni, Ennio ; Shakya, Bibhushan
We discuss a minimal realization of the strongly interacting massive particle (SIMP) framework. [...]
arXiv:2006.15148 ; CERN-TH-2020-107.
- 29 p.
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2020-07-01
04:19
Hadronic light-by-light contribution to $(g-2)_\mu$ from lattice QCD with SU(3) flavor symmetry / Chao, En-Hung ; Gérardin, Antoine ; Green, Jeremy R. ; Hudspith, Renwick J. ; Meyer, Harvey B.
We perform a lattice QCD calculation of the hadronic light-by-light contribution to $(g-2)_\mu$ at the SU(3) flavor-symmetric point $m_\pi=m_K\simeq 420\,$MeV. [...]
arXiv:2006.16224 ; MITP/20-036 ; CERN-TH-2020-109.
- 39 p.
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2020-07-01
04:19
Recent results on $B \to \mu^+ \mu^-$ decays with the CMS experiment / Langenegger, Urs
Results on $B \to \mu^+ \mu^-$ decays with the CMS experiment are reported, using 61 fb$^{-1}$ of data recorded during LHC Run 1 and 2016. [...]
arXiv:2006.14849 ; CMS CR-2020/115.
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2020-07-01
04:17
Double parton distributions in the pion from lattice QCD / Bali, Gunnar S. ; Castagnini, Luca ; Diehl, Markus ; Gaunt, Jonathan R. ; Gläßle, Benjamin ; Schäfer, Andreas ; Zimmermann, Christian
We perform a lattice study of double parton distributions in the pion, using the relationship between their Mellin moments and pion matrix elements of two local currents. [...]
arXiv:2006.14826 ; DESY 20-098 ; CERN-TH-2020-086.
- 58 p.
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2020-07-01
04:17
Heavy-flavour correlations and jets with ALICE at the LHC / Oliveira Da Silva, Antonio Carlos
This contribution summarises the results on heavy-flavour correlations and jets measured with ALICE detector. [...]
arXiv:2006.12606.
- 7 p.
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2020-07-01
04:17
Evolution of a plasma column measured through modulation of a high-energy proton beam / Gessner, S.
Plasma wakefield acceleration is a method for accelerating particle beams using electromagnetic fields that are orders of magnitude larger than those found in conventional radio frequency cavities. [...]
arXiv:2006.09991.
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2020-07-01
04:17
A double integral of dlog forms which is not polylogarithmic / Brown, Francis ; Duhr, Claude
Feynman integrals are central to all calculations in perturbative Quantum Field Theory. [...]
arXiv:2006.09413 ; CERN-TH-2020-097.
- 25 p.
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2020-07-01
04:17
Performance of the BIS78 RPC detectors: a new concept of electronics and detector integration for high-rate and fast timing large size RPCs / Pizzimento, Luca
The reduction of the average charge per count in the gas along with the capability to discriminate very small signals from noise can allow an efficient and long-term Resistive Plate Chamber detector operation in high radiation background environment [...]
arXiv:2006.09722.
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2020-07-01
04:17
Universal scattering laws for bouncing cosmology / Le Floch, Bruno ; LeFloch, Philippe G. ; Veneziano, Gabriele
Many variants of the standard model of cosmology have been proposed where the Big Bang is replaced by a Big Bounce thanks to corrections to Einstein gravity at small scales. [...]
arXiv:2006.08620 ; CERN-TH-2020-101.
- 6 p.
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