# Preprints

 2021-04-1312:12 [PUBDB-2021-01780] Preprint Sirunyan, A. M. ; Tumasyan, A. ; Adam, W. ; 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. [...] OpenAccess: PDF PDF (PDFA); External link: Fulltext 2021-04-1213:40 [PUBDB-2021-01772] Preprint Sirunyan, A. M. ; Tumasyan, A. ; Adam, W. ; 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. [...] OpenAccess: PDF PDF (PDFA); 2021-04-1213:35 [PUBDB-2021-01771] Preprint CMS Collaboration 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. [...] OpenAccess: PDF PDF (PDFA); 2021-04-1213:33 [PUBDB-2021-01770] Preprint CMS Collaboration 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 $137~\mathrm{fb}^{-1}$. [...] OpenAccess: PDF PDF (PDFA); 2021-04-0917:20 [PUBDB-2021-01735] Preprint Guan, Y. ; Schwartz, A. J. ; Kinoshita, K. ; 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. [...] OpenAccess: PDF PDF (PDFA); External link: Fulltext 2021-04-0917:10 [PUBDB-2021-01734] Preprint Li, Y. B. ; Shen, C. P. ; Adachi, I. ; 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. [...] OpenAccess: PDF PDF (PDFA); External link: Fulltext 2021-04-0916:49 [PUBDB-2021-01733] Preprint Li, S. X. ; Shen, C. P. ; Adachi, I. ; 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. [...] OpenAccess: PDF PDF (PDFA); External link: Fulltext 2021-04-0916:38 [PUBDB-2021-01732] Preprint Dubey, S. ; Browder, T. E. ; Aihara, H. ; 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. [...] OpenAccess: PDF PDF (PDFA); External link: Fulltext 2021-04-0213:31 [PUBDB-2021-01638] Preprint Schneidmiller, E. A. ; Brinker, F. ; Decking, W. ; 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] Physical review accelerators and beams 24(3), 030701 (1-12) (2021) [10.1103/PhysRevAccelBeams.24.030701]   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. [...] OpenAccess: PDF PDF (PDFA); External link: Fulltext 2021-03-2911:02 [PUBDB-2021-01570] Preprint Aad, G. ; Abbott, B. K. ; Abbott, D. C. ; 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. [...] OpenAccess: PDF;