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2020-12-04
13:05
OpenAccess [PUBDB-2020-04785] Journal Article/Contribution to a conference proceedings

Operating the Belle II Collaborative Services and Tools
24th International Conference on Computing in High Energy and Nuclear Physics, CHEP2019, AdelaideAdelaide, Australia, 4 Nov 2019 - 8 Nov 20192019-11-042019-11-08 The European physical journal / Web of Conferences 245(9), 08009 () [10.1051/epjconf/202024508009]  GO
In 2016 the Belle II collaboration reviewed and consolidated their collaborative services and tools. Services and tools were migrated into the existing IT infrastructure at DESY. [...]
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ddc:530

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2020-12-04
12:02
OpenAccess [PUBDB-2020-04784] Master Thesis

Search for $\it tZq$ in dilepton final states with Machine Learning techniques
55 pp. () [10.3204/PUBDB-2020-04784] = Masterarbeit, Universit`a degli Studi di Milano - Bicocca, 2020  GO
In this work, events in which a single top quark is produced in association with a Z-boson are investigated. Particular focus is on final states in which two leptons originate from the Z boson and the top quark decays hadronically. [...]
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2020-12-03
13:18
OpenAccess [PUBDB-2020-04747] Journal Article
et al
Search for a doubly charged $D D K$ bound state in $ϒ ( 1 S , 2 S )$ inclusive decays and via direct production in $e^+ e^−$ collisions at $\sqrt{s}$ = 10.520, 10.580, and 10.867 GeV
[Belle Preprint # 2020-10; KEK Preprint # 2020-11; arXiv:2008.13341]
Physical review / D 102(11), 112001 (1-14) () [10.1103/PhysRevD.102.112001]  GO
We report the results of a first search for a doubly-charged $DDK$ bound state, denoted the $R^{++}$, in $\Upsilon(1S)$ and $\Upsilon(2S)$ inclusive decays and via direct production in $e^+e^-$ collisions at $\sqrt{s}$ = 10.520, 10.580, and 10.867 GeV. The search uses data accumulated with the Belle detector at the KEKB asymmetric-energy $e^+e^-$ collider. [...]
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2020-12-03
12:46
OpenAccess [PUBDB-2020-04746] Preprint
et al
Measurement of time-dependent CP violation parameters in $B^0 \to K_0^SK_0^SK_0^S$ decays at Belle
[Belle Preprint 2020-17; KEK Preprint 2020-34; arXiv:2011.00793]
 GO
We measure the time-dependent $C\!P$ violation parameters in $B^{0} \to K^{0}_{S}K^{0}_{S}K^{0}_{S}$ decays using $772 \times 10^6$ $B {\mkern 1.5mu\overline{\mkern-1.5mu B \mkern-0.1mu}\mkern 0.1mu}$ pairs collected at the $\Upsilon (4S)$ resonance with the Belle detector at the KEKB asymmetric-energy $e^+ e^-$ collider. The obtained mixing-induced and direct $C\!P$ asymmetries are $-0.71 \pm 0.23~{\rm(stat)} \pm 0.05~{\rm(syst)}$ and $0.12 \pm 0.16~{\rm(stat)} \pm 0.05~{\rm(syst)}$, respectively. [...]
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2020-12-03
11:58
OpenAccess [PUBDB-2020-04745] Preprint
et al
Search for lepton-number- and baryon-number-violating tau decays at Belle
[Belle Preprint 2020-16; KEK Preprint 2020-33; arXiv:2010.15361]
 GO
We search for lepton-number- and baryon-number-violating decays $\tau^{-}\to\overline{p}e^{+}e^{-}$, $pe^{-}e^{-}$, $\overline{p}e^{+}\mu^{-}$, $\overline{p}e^{-}\mu^{+}$, $\overline{p}\mu^{+}\mu^{-}$, and $p\mu^{-}\mu^{-}$ using 921 fb$^{-1}$ of data, equivalent to $(841\pm12)\times 10^6$ $\tau^{+}\tau^{-}$ events, recorded with the Belle detector at the KEKB asymmetric-energy $e^{+}e^{-}$ collider. In the absence of a signal, $90\%$ confidence-level upper limits are set on the branching fractions of these decays in the range $(1.8$-$4.0)\times 10^{-8}$. [...]
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2020-12-03
11:57
OpenAccess [PUBDB-2020-04744] Journal Article
et al
Corrigendum: An Accurate and Efficient Laser-Envelope Solver for the Modeling of Laser-Plasma Accelerators
Corrigendum: "An accurate and efficient laser-envelope solver for themodeling of laser-plasma accelerators ", Plasma Phys. Control [...]
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ddc:620

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2020-12-03
11:35
OpenAccess [PUBDB-2020-04741] Preprint
et al
The Anomalous Case of Axion EFTs and Massive Chiral Gauge Fields
[DESY-20-194; HU-EP-20/32; arXiv:2011.10025]
 GO
We study axion effective field theories (EFTs), with a focus on axion couplings to massive chiral gauge fields. We investigate the EFT interactions that participate in processes with an axion and two gauge bosons, and we show that, when massive chiral gauge fields are present, such interactions do not entirely originate from the usual anomalous EFT terms. [...]
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2020-12-03
11:34
OpenAccess [PUBDB-2020-04739] Preprint

Two-Point Correlator of Chiral Primary Operators with a Wilson Line Defect in $\mathcal{N}=4$ SYM
[DESY-20-191; HU-EP-20/33-RTG; arXiv:2011.04678]
 GO
We study the two-point function of the stress-tensor multiplet of $\mathcal{N}=4$ SYM in the presence of a line defect. To be more precise, we focus on the single-trace operator of conformal dimension two that sits in the $20'$ irrep of the $\mathfrak{so}(6)_\text{R}$ R-symmetry, and add a Maldacena-Wilson line to the configuration which makes the two-point function non-trivial. [...]
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2020-12-03
11:32
OpenAccess [PUBDB-2020-04738] Preprint
et al
Lessons from the $B^{0,+}\to K^{*0,+}\mu^+\mu^-$ angular analyses
[DESY-20-190; HU-EP-20/30; P3H-20-064; TTP20-037; UCI-TR 2020-18; arXiv:2011.01212]
 GO
We perform an analysis within the Standard Model of $B^{0,+} \to K^{*0,+} \mu^+ \mu^-$ decays in light of the recent measurements from the LHCb experiment, showing that new data strengthen the need for sizable hadronic contributions and correlations among them. We then extend our analysis to New Physics via the Standard Model Effective Theory, and carry out a state-of-the-art fit of available $b \to s \ell^+ \ell^-$ data, including possible hadronic contributions. [...]
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2020-12-03
11:29
OpenAccess [PUBDB-2020-04737] Preprint

Two-loop analysis of classically scale-invariant models with extended Higgs sectors
[DESY-20-192; OU-HET-1077; arXiv:2011.07580]
 GO
We present the first explicit calculation of leading two-loop corrections to the Higgs trilinear coupling $\lambda_{hhh}$ in models with classical scale invariance (CSI), using the effective-potential approximation. Furthermore, we also study -- for the first time at two loops -- the relation that appears between the masses of all states in CSI theories, due to the requirement of reproducing correctly the 125-GeV Higgs-boson mass. [...]
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