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2021-11-26
11:24
OpenAccess [PUBDB-2021-04836] Journal Article
; ; ; et al
Diffusive origin for the cosmic-ray spectral hardening reveals signatures of a nearby source in the leptons and protons data
In this work we aim at reproducing, simultaneously, the spectral feature at ∼10 TeV in the cosmic-ray proton spectrum, recently reported by the DAMPE Collaboration, together with the spectral break at ∼1 TeV measured by H.E.S.S. in the lepton spectrum. [...]
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2021-11-25
18:27
OpenAccess [PUBDB-2021-04824] Journal Article
; ; ; et al
Cryogenically Formed Discharge Waveguide
We describe the development and operation of a regenerative, cryogenically-formed discharge waveguide formed by freezing nitrous oxide gas onto the inner wall of a sapphire capillary. We demonstrate a technique for varying the channel diameter in situ and present guiding of low-power laser pulses through 6-cm long waveguides with channel diameters of 0.7, 0.8, and 1 mm. [...]
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2021-11-25
18:11
OpenAccess [PUBDB-2021-04823] Journal Article
; ; ; et al
2020 Roadmap on Plasma Accelerators
Plasma-based accelerators use the strong electromagnetic fields that can be supported by plasmas to accelerate charged particles to high energies. Accelerating field structures in plasma can be generated by powerful laser pulses or charged particle beams. [...]
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2021-11-24
15:17
OpenAccess [PUBDB-2021-04814] Preprint
; ; ; et al
Measurement of the inclusive and differential WZ production cross sections, polarization angles, and triple gauge couplings in pp collisions at $\sqrt{s}$ = 13 TeV
[CERN-EP-2021-163; CMS-SMP-20-014; arXiv:2110.11231]
The associated production of a W and a Z boson is studied in final states with multiple leptons produced in proton-proton (pp) collisions at a centre-of-mass energy of 13 TeV using 137 fb$^{-1}$ of data collected with the CMS detector at the LHC. A measurement of the total inclusive production cross section yields $\sigma_{\text{tot}}$(pp $\to$ WZ) = 50.6 $\pm$ 0.8 (stat) $\pm$ 1.5 (syst) $\pm$ 1.1 (lum) $\pm$ 0.5 (thy) pb. [...]
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2021-11-24
15:15
OpenAccess [PUBDB-2021-04813] Preprint
; ; ; et al
Search for long-lived particles produced in association with a Z boson in proton-proton collisions at $\sqrt{s}$ = 13 TeV
[CERN-EP-2021-198; CMS-EXO-20-003; arXiv:2110.13218]
A search for long-lived particles (LLPs) produced in association with a Z boson is presented. The study is performed using data from proton-proton collisions with a center-of-mass energy of 13 TeV recorded by the CMS experiment during 2016-2018, corresponding to an integrated luminosity of 117 fb$^{-1}$. [...]
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2021-11-24
15:13
OpenAccess [PUBDB-2021-04812] Preprint

Search for low-mass dilepton resonances in Higgs boson decays to four-lepton final states in proton-proton collisions at $\sqrt{s}$ =13 TeV
[CERN-EP-2021-093; CMS-HIG-19-007; arXiv:2111.01299]
A search for low-mass dilepton resonances in Higgs boson decays is conducted in the four-lepton final state. The decay is assumed to proceed via a pair of beyond the standard model particles, or one such particle and a Z boson. [...]
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2021-11-24
15:11
OpenAccess [PUBDB-2021-04811] Preprint

Search for flavor-changing neutral current interactions of the top quark and Higgs boson in final states with two photons in proton-proton collisions at $\sqrt{s}$ =13 TeV
[CERN-EP-2021-201; CMS-TOP-20-007; arXiv:2111.02219]
Proton-proton interactions resulting in final states with two photons are studied in a search for the signature of flavor-changing neutral current interactions of top quarks (t) and Higgs bosons (H). The analysis is based on data collected at a center-of-mass energy of 13 TeV with the CMS detector at the LHC, corresponding to an integrated luminosity of 137 fb$^{-1}$. [...]
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2021-11-24
15:09
OpenAccess [PUBDB-2021-04810] Preprint

Inclusive and differential cross section measurements of single top quark production in association with a Z boson in proton-proton collisions at $\sqrt{s}$ = 13 TeV
[CERN-EP-2021-210; CMS-TOP-20-010; arXiv:2111.02860]
Inclusive and differential cross sections of single top quark production in association with a Z boson are measured in proton-proton collisions at a center-of-mass energy of 13 TeV with a data sample corresponding to an integrated luminosity of 138 fb$^{-1}$ recorded by the CMS experiment. Events are selected based on the presence of three leptons, electrons or muons, associated with leptonic Z boson and top quark decays. [...]
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2021-11-24
15:06
OpenAccess [PUBDB-2021-04809] Preprint

A new calibration method for charm jet identification validated with proton-proton collision events at $\sqrt{s}$ =13 TeV
[CERN-EP-2021-177; CMS-BTV-20-001; arXiv:2111.03027]
Many measurements at the LHC require efficient identification of heavy-flavour jets, i.e., jets originating from bottom (b) or charm (c) quarks. An overview of the algorithms used to identify c jets is described and a novel method to calibrate them is presented. [...]
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2021-11-24
15:04
OpenAccess [PUBDB-2021-04808] Preprint
; ; ; et al
Study of dijet events with large rapidity separation in proton-proton collisions at $\sqrt{s}$ = 2.76 TeV
[CERN-EP-2021-173; CMS-FSQ-13-004; arXiv:2111.04605]
The cross sections for inclusive and Mueller-Navelet dijet production are measured as a function of the rapidity separation between the jets in proton-proton collisions at $\sqrt{s}$ = 2.76 TeV for jets with transverse momentum $p_\mathrm{T} \gt $ 35 GeV and rapidity $\vert y\vert\lt $ 4.7. Various dijet production cross section ratios are also measured. [...]
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