Preprints

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2021-04-13
12:12
OpenAccess [PUBDB-2021-01780] Preprint
; ; ; et al
Precision luminosity measurement in proton-proton collisions at $\sqrt{s} =$ 13 TeV in 2015 and 2016 at CMS
[CERN-EP-2021-033; CMS-LUM-17-003; arXiv:2104.01927]
The measurement of the luminosity recorded by the CMS detector installed at LHC interaction point 5, using proton-proton collisions at $\sqrt{s} =$ 13 TeV in 2015 and 2016, is reported. The absolute luminosity scale is measured for individual bunch crossings using beam-separation scans (the van der Meer method), with a relative precision of 1.2% and 1.0% in 2015 and 2016, respectively. [...]
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2021-04-12
13:40
OpenAccess [PUBDB-2021-01772] Preprint
; ; ; et al
High precision measurements of Z boson production in PbPb collisions at $\sqrt{s_\mathrm{NN}} =$ 5.02 TeV
[CERN-EP-2021-039; CMS-HIN-19-003; arXiv:2103.14089]
The CMS experiment at the LHC has measured the differential cross sections of Z bosons decaying to pairs of leptons, as functions of transverse momentum and rapidity, in lead-lead collisions at a nucleon-nucleon center-of-mass energy of 5.02 TeV. The measured Z boson elliptic azimuthal anisotropy coefficient is compatible with zero, showing that Z bosons do not experience significant final-state interactions in the medium produced in the collision. [...]
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2021-04-12
13:35
OpenAccess [PUBDB-2021-01771] Preprint

Search for charged Higgs bosons produced in vector boson fusion processes and decaying into vector boson pairs in proton-proton collisions at $\sqrt{s}=13~\mathrm{TeV}$
[CMS-PAS-HIG-20-017]
A search for charged Higgs bosons produced in vector boson fusion processes and decaying into vector bosons using proton-proton collisions at $\sqrt{s}=13~\mathrm{TeV}$ at the LHC is reported. The data sample corresponds to an integrated luminosity of $137~\mathrm{fb}^{-1}$ collected with the CMS detector. [...]
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2021-04-12
13:33
OpenAccess [PUBDB-2021-01770] Preprint

Search for a W$^\prime$ boson decaying to a top and a bottom quark at $\sqrt{s}=13~\mathrm{TeV}$
[CMS-PAS-B2G-20-005]
A search is performed for a W$^\prime$ boson decaying to a top and a bottom quark in proton-proton collisions at a center-of-mass energy of $13~\mathrm{TeV}$. The analyzed data have been collected by the CMS Collaboration between 2016 and 2018 and correspond to an integrated luminosity of $137~\mathrm{fb}^{-1}$. [...]
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2021-04-09
17:20
OpenAccess [PUBDB-2021-01735] Preprint
; ; ; et al
Measurement of branching fractions and $CP$ asymmetries for $D_s^{+} \rightarrow K^+ (\eta, \pi^0) $ and $D_s^{+} \rightarrow \pi^+ (\eta, \pi^0)$ decays at Belle
[Belle Preprint 2021-04; KEK Preprint 2020-46; UC Preprint UCHEP-21-02; arXiv:2103.09969]
We report measurements of the branching fractions and $CP$ asymmetries for $D_s^{+} \rightarrow K^{+} \eta $, $D_s^{+} \rightarrow K^{+} \pi^0 $, and $D_s^{+} \rightarrow \pi^{+} \eta $ decays, and the branching fraction for $D_s^{+} \rightarrow \pi^{+} \pi^0$. Our results are based on a data sample corresponding to an integrated luminosity of 921 fb$^{-1}$ collected by the Belle detector at the KEKB $e^+e^-$ asymmetric-energy collider. [...]
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2021-04-09
17:10
OpenAccess [PUBDB-2021-01734] Preprint
; ; ; et al
Measurements of the branching fractions of semileptonic decays $\Xi_{c}^{0} \to \Xi^{-} \ell^{+} \nu_{\ell}$ and asymmetry parameter of $\Xi_{c}^{0} \to \Xi^{-} \pi^{+}$ decay
[Belle Preprint 2021-03; KEK Preprint 2020-44; arXiv:2103.06496]
Using a data sample of 89.5 fb$^{-1}$ recorded at the energy $\sqrt{s}=10.52$ GeV with the Belle detector at the KEKB $e^+e^-$ collider, we report measurements of branching fractions of semileptonic decays $\Xi_{c}^{0} \to \Xi^{-} \ell^{+} \nu_{\ell}$ ($\ell=e$ or $\mu$). Furthermore, based on an additional data sample of 711 fb$^{-1}$ at $\sqrt{s} = 10.58$ GeV, the $CP$-asymmetry parameter of $\Xi_{c}^{0} \to \Xi^{-} \pi^{+}$ decay is extracted. [...]
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2021-04-09
16:49
OpenAccess [PUBDB-2021-01733] Preprint
; ; ; et al
Measurements of the branching fractions of $\Lambda_c^+ \to p \eta$ and $\Lambda_c^+ \to p \pi^0$ decays at Belle
[Belle Preprint 2021-02; KEK Preprint 2020-42; arXiv:2102.12226]
We report measurements of the branching fractions of singly Cabibbo-suppressed decays $\Lambda_c^+ \to p \eta$ and $\Lambda_c^+ \to p \pi^0$ using the full Belle data sample corresponding to an integrated luminosity of 980.6 $\rm fb^{-1}$. The data were collected by the Belle detector at the KEKB $e^{+}$$e^{-}$ asymmetric-energy collider. [...]
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2021-04-09
16:38
OpenAccess [PUBDB-2021-01732] Preprint
; ; ; et al
Search for $B_{s}^{0} \rightarrow \eta^{\prime} X_{s\bar{s}}$ at Belle Using a Semi-Inclusive Method
[Belle Preprint 2021-01; KEK Preprint 2020-40; arXiv:2102.10266]
We report the first search for the penguin-dominated process $B_{s}^{0} \rightarrow \eta^{\prime} X_{s\bar{s}}$ using a semi-inclusive method. A 121.4 $\mathrm{fb}^{-1}$ integrated luminosity $\Upsilon(5S)$ data set collected by the Belle experiment, at the KEKB asymmetric-energy $e^+e^-$ collider, is used. [...]
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2021-04-02
13:31
OpenAccess [PUBDB-2021-01638] Preprint
; ; ; et al
Observation of Harmonic Lasing in the Angstrom Regime at European X-Ray Free Electron Laser
[21-036; DESY-21-036; arXiv:2104.00384]
Harmonic lasing provides an opportunity to extend the photon energy range of existing and planned X-ray FEL user facilities. Contrary to nonlinear harmonic generation, harmonic lasing can generate a much more intense, stable, and narrow-band FEL beam. [...]
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2021-03-29
11:02
OpenAccess [PUBDB-2021-01570] Preprint
; ; ; et al
Measurements of $W^+W^-+\ge 1~$jet production cross-sections in $pp$ collisions at $\sqrt{s}=13~$TeV with the ATLAS detector
[CERN-EP-2021-030; arXiv:2103.10319]
Fiducial and differential measurements of $W^+W^-$ production in events with at least one hadronic jet are presented. These cross-section measurements are sensitive to the properties of electroweak-boson self-interactions and provide a test of perturbative quantum chromodynamics and the electroweak theory. [...]
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