Preprints

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2021-07-22
11:10
OpenAccess [PUBDB-2021-03026] Preprint
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TMD parton densities and corresponding parton showers: the advantage of four- and five-flavour schemes
[DESY-21-094; arXiv:2106.09791]
The calculations of $Z + b{\bar b}$ tagged jet production performed in the four- and five-flavour schemes allow for detailed comparison of the heavy flavour structure of collinear and transverse momentum dependent (TMD) parton distributions as well as for detailed investigations of heavy quarks radiated during the initial state parton shower cascade. We have determined the first set of collinear and TMD parton distributions in the four-flavour scheme with NLO DGLAP splitting functions within the Parton-Branching (PB) approach. [...]
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2021-07-22
11:02
OpenAccess [PUBDB-2021-03025] Preprint
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TMD Evolution and Multi-Jet Merging
[arXiv:2107.01224]
The theoretical description of the physics of multi-jets in hadronic collisions at high energies is based on 'merging' methods, which combine short-timescale production of jets with long-timescale evolution of partonic showers. We point out potential implications of the evolution of transverse momentum dependent (TMD) distributions on the structure of multi-jet states at high energies, and in particular on the theoretical systematics associated with multi-jet merging. [...]
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2021-07-12
13:44
OpenAccess [PUBDB-2021-02958] Preprint
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Measurement of the inclusive and differential $\mathrm{t\overline{t}}\gamma$ cross sections in the single-lepton channel and EFT interpretation at $\sqrt{s}$ = 13 TeV
[CERN-EP-2021-117; CMS-TOP-18-010; arXiv:2107.01508]
The production cross section of a top quark pair in association with a photon is measured in proton-proton collisions at a center-of-mass energy of 13 TeV. The data set, corresponding to an integrated luminosity of 137 fb$^{-1}$, was recorded by the CMS experiment during the 2016-2018 data taking of the LHC. [...]
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2021-07-12
13:40
OpenAccess [PUBDB-2021-02957] Preprint
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Measurements of the electroweak diboson production cross sections in proton-proton collisions at $\sqrt{s} =$ 5.02 TeV using leptonic decays
[CERN-EP-2021-111; CMS-SMP-20-012; arXiv:2107.01137]
The first measurements of diboson production cross sections in proton-proton interactions at a center-of-mass energy of 5.02 TeV are reported. They are based on data collected with the CMS detector at the LHC, corresponding to an integrated luminosity of 302 pb$^{-1}$. [...]
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2021-07-12
13:38
OpenAccess [PUBDB-2021-02956] Preprint
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Search for electroweak production of charginos and neutralinos in proton-proton collisions at $\sqrt{s} = $ 13 TeV
[CERN-EP-2021-097; CMS-SUS-19-012; arXiv:2106.14246]
A direct search for electroweak production of charginos and neutralinos is presented. Events with three or four leptons, with up to two hadronically decaying $\tau$ leptons, or two same-sign light leptons are analyzed. [...]
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2021-07-12
13:35
OpenAccess [PUBDB-2021-02955] Preprint
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Fragmentation of jets containing a prompt J$/\psi$ meson in PbPb and pp collisions at $\sqrt{s_\mathrm{NN}} =$ 5.02 TeV
[CERN-EP-2021-104; CMS-HIN-19-007; arXiv:2106.13235]
Jets containing a prompt J$/\psi$ meson are studied in lead-lead collisions at a nucleon-nucleon center-of-mass energy of 5.02 TeV, using the CMS detector at the LHC. Jets are selected to be in the transverse momentum range of 30 $\lt p_\mathrm{T} \lt$ 40 GeV. [...]
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2021-07-12
12:15
OpenAccess [PUBDB-2021-02954] Preprint
; ; ; et al
Measurement of the electroweak production of Z$\gamma$ and two jets in proton-proton collisions at $\sqrt{s}=$ 13 TeV and constraints on anomalous quartic gauge couplings
[CERN-EP-2021-095; CMS-SMP-20-016; arXiv:2106.11082]
The first observation of the electroweak (EW) production of a Z boson, a photon, and two forward jets (Z$\gamma$jj) in proton-proton collisions at a center-of-mass energy of 13 TeV is presented. A data set corresponding to an integrated luminosity of 137 fb$^{-1}$, collected by the CMS experiment at the LHC in 2016-2018 is used. [...]
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2021-07-12
12:11
OpenAccess [PUBDB-2021-02953] Preprint
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Search for W$\gamma$ resonances in proton-proton collisions at $\sqrt{s} =$ 13 TeV using hadronic decays of Lorentz-boosted W bosons
[CERN-EP-2021-102; CMS-EXO-20-001; arXiv:2106.10509]
A search for W$\gamma$ resonances in the mass range between 0.7 and 6.0 TeV is presented. The W boson is reconstructed via its hadronic decays, with the final-state products forming a single large-radius jet, owing to a high Lorentz boost of the W boson. [...]
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2021-07-12
12:09
OpenAccess [PUBDB-2021-02952] Preprint
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Search for a heavy Higgs boson decaying into two lighter Higgs bosons in the $\tau\tau$bb final state at 13 TeV
[CERN-EP-2021-094; CMS-HIG-20-014; arXiv:2106.10361]
A search for a heavy Higgs boson H decaying into the observed Higgs boson h with a mass of 125 GeV and another Higgs boson h$_\mathrm{S}$ is presented. The h and h$_\mathrm{S}$ bosons are required to decay into a pair of tau leptons and a pair of b quarks, respectively. [...]
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2021-07-07
14:13
OpenAccess [PUBDB-2021-02884] Preprint
; ; ; et al
Measurement of prompt open-charm production cross sections in proton-proton collisions at $\sqrt{s} = $ 13 TeV
[CERN-EP-2021-085; CMS-BPH-18-003; arXiv:2107.01476]
The production cross sections for prompt open-charm mesons in proton-proton collisions at a center-of-mass energy of 13 TeV are reported. The measurement is performed using a data sample collected by the CMS experiment corresponding to an integrated luminosity of 29 nb$^{-1}$. [...]
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