Wed·May 11, 2022Wednesday·May 11, 2022

1. 01*

   Evidence of a near-threshold resonance in ${}^{11}$B relevant to the $\beta$-delayed proton emission of ${}^{11}$Be

   Y. Ayyad🇪🇸 · W. Mittig🇺🇸 · T. Tang🇺🇸 · B. Olaizola🇨🇦 · G. Potel🇺🇸 · N. Rijal🇺🇸 · N. Watwood🇺🇸 · H. Alvarez-Pol🇪🇸 · D. Bazin🇺🇸 · M. Caamaño🇪🇸 · J. Chen🇺🇸 · M. Cortesi🇺🇸 and 18 other authors

   A narrow near-threshold proton-emitting resonance (Ex = 11.4 MeV, J${}^{\pi }$ = 1/2${}^{+}$ and ${\Gamma }_p$ = 4.4 keV) was directly observed in ${}^{11}$B via proton resonance scattering. This resonance was previously inferred in the $\beta$-delayed proton emission of the neutron halo nucleus ${}^{11}$Be. The good agreement between both experimental results serves as a ground to confirm the existence of such exotic decay and the particular behavior of weakly bound nuclei coupled to the continuum. $R$-matrix analysis shows a sizable partial decay width for both, proton and $\alpha$ emission channels.

   nucl-exPRL(2022)·27 citations
2. 02*

   An Energy-dependent Electro-thermal Response Model of CUORE Cryogenic Calorimeter

   CUORE Collaboration: D. Q. Adams · C. Alduino · K. Alfonso · F. T. Avignone III · O. Azzolini · G. Bari · F. Bellini · G. Benato · M. Beretta · M. Biassoni · A. Branca · C. Brofferio and 108 other authors

   The Cryogenic Underground Observatory for Rare Events (CUORE) is the most sensitive experiment searching for neutrinoless double-beta decay ($0\nu \beta \beta$) in ${}^{130}\text{Te}$. CUORE uses a cryogenic array of 988 TeO${}_2$ calorimeters operated at $\sim$10 mK with a total mass of 741 kg. To further increase the sensitivity, the detector response must be well understood. Here, we present a non-linear thermal model for the CUORE experiment on a detector-by-detector basis. We have examined both equilibrium and dynamic electro-thermal models of detectors by numerically fitting non-linear differential equations to the detector data of a subset of CUORE channels which are well characterized and representative of all channels. We demonstrate that the hot-electron effect and electric-field dependence of resistance in NTD-Ge thermistors alone are inadequate to describe our detectors' energy dependent pulse shapes. We introduce an empirical second-order correction factor in the exponential temperature dependence of the thermistor, which produces excellent agreement with energy-dependent pulse shape data up to 6 MeV. We also present a noise analysis using the fitted thermal parameters and show that the intrinsic thermal noise is negligible compared to the observed noise for our detectors.

   ↳ physics.ins-detnucl-exJINST(2022)·9 citations
3. 03*

   Unveiling Nucleon 3D Chiral-Odd Structure with Jet Axes

   Wai Kin Lai🇨🇳 · Xiaohui Liu🇨🇳 · Manman Wang🇨🇳 · Hongxi Xing🇨🇳

   We reinterpret jet clustering as an axis-finding procedure which, along with the proton beam, defines the virtual-photon transverse momentum $q_T$ in deep inelastic scattering (DIS). In this way, we are able to probe the nucleon intrinsic structure using jet axes in a fully inclusive manner, similar to the Drell-Yan process. We present the complete list of azimuthal asymmetries and the associated factorization formulae at leading power for deep-inelastic scattering of a nucleon. The factorization formulae involve both the conventional time-reversal-even (T-even) jet function and the T-odd one, which have access to all transverse-momentum-dependent parton distribution functions (TMD PDFs) at leading twist. Since the factorization holds as long as $q_T\ll Q$, where $Q$ is the photon virtuality, the jet-axis probe into the nucleon structure should be feasible for machines with relatively low energies such as the Electron-Ion Collider in China (EicC). We show that, within the winner-take-all (WTA) axis-finding scheme, the coupling between the T-odd jet function and the quark transversity or the Boer-Mulders function could induce sizable azimuthal asymmetries at the EicC, the EIC and HERA. We also give predictions for the azimuthal asymmetry of back-to-back dijet production in $e^{+}{e}^{-}$ annihilation at Belle and other energies.

   ↳ hep-phhep-exnucl-ex16 citations

* Reconstructed cohort: no mailing for this day survives in the archive. Papers are grouped by their submission times and arXiv's announcement cut-off, assuming announcement without delay; positions follow identifier order. Validated at ~91% exact-day agreement against the archived era.