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CERN Document Server 352 записей найдено  1 - 10следующийконец  перейти к записи: Поиск длился 0.78 секунд. 
1.
Focus topics for the ECFA study on Higgs / Top / EW factories / de Blas, Jorge (Granada U.) ; Koppenburg, Patrick (Nikhef, Amsterdam) ; List, Jenny (DESY) ; Maltoni, Fabio (Louvain U.) ; Maestre, Juan Alcaraz (Madrid, CIEMAT) ; Alimena, Juliette (DESY) ; Alison, John (Carnegie Mellon U.) ; Azzi, Patrizia (INFN, Padua) ; Azzurri, Paolo (INFN, Pisa) ; Bagnaschi, Emanuele (CERN ; INFN, Italy) et al.
In order to stimulate new engagement and trigger some concrete studies in areas where further work would be beneficial towards fully understanding the physics potential of an $e^+e^-$ Higgs / Top / Electroweak factory, we propose to define a set of focus topics. [...]
arXiv:2401.07564.
- 65.
Fulltext
2.
B+ -> K+ nu nubar and other highlights from Belle II / Manoni, Elisa (speaker) (Universita e INFN, Perugia (IT))
In this seminar, we will first survey selected first physics highlights from the Belle II experiment at the SuperKEKB collider in Japan, before going in depth on our recent measurement of $B^+\rightarrow K^+ \nu\bar{\nu}$.  The decay $B^+\rightarrow K^+ \nu\bar{\nu}$ is mediated by a flavor-changing neutral current. In the Standard Model, the predicted branching fraction is about $6\times 10^{-5}$, while enhancements are foreseen in New Physics scenarios.We search for this rare decay in a 362 fb$^{-1}$ sample of electron-positron collisions at the $\Upsilon(4S)$ resonance. [...]
2023 - 3208. EP Seminar External link: Event details In : B+ -> K+ nu nubar and other highlights from Belle II
3.
Measurement of the inclusive semileptonic $B$ meson branching fraction in 62.8 fb$^{-1}$ of Belle II data / Belle-II Collaboration
We report a measurement of the branching fraction of inclusive semileptonic $B$ meson decays $B\to X_c\ell\nu\ell$ in $\Upsilon(4S)\to B\bar B$~data recorded by the Belle II experiment at the SuperKEKB asymmetric-energy $e^+e^-$ collider and corresponding to 62.8 fb$^{-1}$ of integrated luminosity. [...]
arXiv:2111.09405 ; BELLE2-CONF-PH-2021-012.
- 17.
Fulltext
4.
Exclusive $B \to X_u \ell \nu_\ell$ Decays with Hadronic Full-event-interpretation Tagging in 62.8 fb$^{-1}$ of Belle II Data / Belle-II Collaboration
We present a reconstruction in early data of the semileptonic decay $B^+ \to \pi^0 \ell^+ \nu_\ell$, and first results of a reconstruction of the decays $B^+ \to \rho^0 \ell^+ \nu_\ell$ and $B^0 \to \rho^- \ell^+ \nu_\ell$ in a sample corresponding to 62.8 fb$^{-1}$ of Belle II data using hadronic $B$-tagging via the full-event-interpretation algorithm. [...]
arXiv:2111.00710 ; BELLE2-CONF-PH-2021-013.
- 24.
Fulltext
5.
Measurements of branching fractions and CP-violating charge asymmetries in multibody charmless $B$ decays reconstructed in 2019-2020 Belle II data / Belle-II Collaboration
We report on measurements of branching fractions ($\mathcal{B}$) and CP-violating charge asymmetries ($\mathcal{A}_{\rm CP}$) of multibody charmless $B$ decays reconstructed by the Belle II experiment at the SuperKEKB electron-positron collider. [...]
arXiv:2109.10807 ; BELLE2-CONF-PH-2021-002.
- 28.
Fulltext
6.
Search for a heavy composite Majorana neutrino in events with dilepton signatures from proton-proton collisions at $ \sqrt{s} = $ 13 TeV / CMS Collaboration
Results are presented of a search for a heavy Majorana neutrino $ \mathrm{N}_{\ell} $ decaying into two same-flavor leptons $ \ell $ (electrons or muons) and a quark-pair jet. A model is considered in which the $ \mathrm{N}_{\ell} $ is an excited neutrino in a compositeness scenario. [...]
arXiv:2210.03082; CMS-EXO-20-011; CERN-EP-2022-181; CMS-EXO-20-011-003.- Geneva : CERN, 2023-06-14 - 25 p. - Published in : Phys. Lett. B 843 (2023) 137803 Fulltext: 2210.03082 - PDF; CMS-EXO-20-011-arXiv - PDF; d3ec182f492789b11712621c027809b2 - PDF; Fulltext from Publisher: PDF; External link: Fermilab Library Server
7.
Nuclear modification of $\Upsilon$ states in pPb collisions at $\sqrt{s_\mathrm{NN}}$ = 5.02 TeV / CMS Collaboration
Production cross sections of $\Upsilon$(1S), $\Upsilon$(2S), and $\Upsilon$(3S) states decaying into ${\mu^{+}\mu^{-}}$ in proton-lead (pPb) collisions are reported using data collected by the CMS experiment at ${\sqrt {\smash [b]{s_{_{\mathrm {NN}}}}}} = $ 5.02 TeV. A comparison is made with corresponding cross sections obtained with pp data measured at the same collision energy and scaled by the Pb nucleus mass number. [...]
arXiv:2202.11807; CMS-HIN-18-005; CERN-EP-2020-181; CMS-HIN-18-005-004.- Geneva : CERN, 2022-08-28 - 40 p. - Published in : Phys. Lett. B 835 (2022) 137397 Fulltext: jt - PDF; CMS-HIN-18-005-arXiv - PDF; 2202.11807 - PDF; Fulltext from Publisher: PDF; Fulltext from publisher: PDF; External link: Fermilab Library Server
8.
Search for Darkonium in $e^+e^-$ Collisions / BABAR Collaboration
Collider searches for dark sectors, new particles interacting only feebly with ordinary matter, have largely focused on identifying signatures of new mediators, leaving much of dark sector structures unexplored. In particular, the existence of dark matter bound states (darkonia) remains to be investigated. [...]
arXiv:2106.08529; BABAR-PUB-21/002; SLAC-PUB-17608.- 2022-01-11 - 10 p. - Published in : Phys. Rev. Lett. 128 (2022) 021802 Fulltext: PDF;
9.
First measurement of large area jet transverse momentum spectra in heavy-ion collisions / CMS Collaboration
Jet production in lead-lead (PbPb) and proton-proton (pp) collisions at a nucleon-nucleon center-of-mass energy of 5.02 TeV is studied with the CMS detector at the LHC, using PbPb and pp data samples corresponding to integrated luminosities of 404 $\mu$b$^{-1}$ and 27.4 pb$^{-1}$, respectively. Jets with different areas are reconstructed using the anti-$k_{\mathrm{T}}$ algorithm by varying the distance parameter $R$. [...]
arXiv:2102.13080; FERMILAB-PUB-21-160-CMS; CMS-HIN-18-014; CERN-EP-2020-226; CMS-HIN-18-014-004.- Geneva : CERN, 2021-05-31 - 48 p. - Published in : JHEP 2105 (2021) 284 Article from SCOAP3: PDF; Fulltext: CMS-HIN-18-014-arXiv - PDF; 2102.13080 - PDF; External links: Additional information for the analysis; CMS AuthorList
10.
Evidence for X(3872) in Pb-Pb Collisions and Studies of its Prompt Production at $\sqrt {s_{NN}}$=5.02  TeV / CMS Collaboration
The first evidence for X(3872) production in relativistic heavy ion collisions is reported. The X(3872) production is studied in lead-lead (PpPb) collisions at a center-of-mass energy of ${\sqrt {\smash [b]{s_{_{\mathrm {NN}}}}}} = $ 5.02 TeV per nucleon pair, using the decay chain ${\mathrm{X}(3872)} \to \mathrm{J}/\psi\,\pi^{+}\pi^{-}\to \mu^{+}\mu^{-}\pi^{+}\pi^{-}$. [...]
arXiv:2102.13048; CMS-HIN-19-005; CERN-EP-2021-023; CMS-HIN-19-005-003.- Geneva : CERN, 2022-01-19 - 18 p. - Published in : Phys. Rev. Lett. 128 (2022) 032001 Fulltext: 2102.13048 - PDF; CMS-HIN-19-005-arXiv - PDF; Fulltext from Publisher: PDF; External links: Additional information for the analysis; CMS AuthorList

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