Probing sterile neutrinos in B (D) meson decays at Belle II (BESIII)

Kim, C. S.; Kwon, Y. J.; Lee, Donghun; Oh, Sechul; Sahoo, Dibyakrupa

doi:10.1140/epjc/s10052-020-8310-2

Cited by 11 publications

(4 citation statements)

References 115 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In 2020, we reported the first observation of 𝑋 (2370) → 𝐾 K𝜂 in 𝐽/𝜓 → 𝛾𝐾 K𝜂 but did not find evidence for 𝑋 (2120) → 𝐾 K𝜂 . The mass and width of 𝑋 (2370) are 2341.6 ± 6.5 ± 5.7 MeV/𝑐 2 and 117 ± 10 ± 8 MeV [46]. In 2021, we reported search for 𝑋 (2370) → 𝜂𝜂𝜂 in 𝐽/𝜓 → 𝛾𝜂𝜂𝜂 and no evidence was found [47].…”

Section: Highlights Of Besiii Physicsmentioning

confidence: 99%

Highlights of BESIII Physics

2024

Proceedings of the 10th International Workshop on Chiral Dynamics — PoS(CD2021)

View full text Add to dashboard Cite

Since 2009, the BESIII detector operating at the BEPCII collider has collected data samples in the center-of-mass energy region from 2.0 to 4.95 GeV. All data samples correspond to integrated luminosity of 32 fb −1 in total. To date, fruitful results related to 𝜏-charm physics have been achieved from analyses of these data samples. We herein briefly introduce some highlights on the experimental studies of charmed hadrons, light hadrons, charmonium(-like) states, strangeniumlike states, and baryon form factors and decay parameters.

show abstract

Section: Highlights Of Besiii Physicsmentioning

confidence: 99%

Highlights of BESIII Physics

2024

Proceedings of the 10th International Workshop on Chiral Dynamics — PoS(CD2021)

View full text Add to dashboard Cite

show abstract

“…Signatures of directly detectable or escaping long-lived particles at B factories have also been discussed in refs. [30,[46][47][48][49][50][51][52][53][54][55][56][57][58][59] This paper is organized as follows: section 2 contains the theoretical framework of the RPV scenario. This includes the effective Lagrangian with the RPV terms and the calculation of the matrix elements, which we estimate using an effective BNV Lagrangian.…”

Section: Jhep02(2023)224mentioning

confidence: 99%

Probing R-parity violation in B-meson decays to a baryon and a light neutralino

Dib

Helo

Lyubovitskij

et al. 2023

J. High Energ. Phys.

View full text Add to dashboard Cite

We propose a search for B meson decays to a baryon plus missing energy at the Belle II experiment to probe supersymmetry with a GeV-scale lightest neutralino $$ {\overset{\sim }{\chi}}_1^0 $$ χ ~ 1 0 and R-parity violation (RPV). We perform analytic computations of the signal branching fractions in the framework of effective field theory, with a single nonzero RPV operator $$ {\lambda}_{ij3}^{\prime \prime }{\overline{U}}_i^c{\overline{D}}_j^c{\overline{D}}_3^c $$ λ ij 3 ′ ′ U ¯ i c D ¯ j c D ¯ 3 c , where i, j = 1, 2. The hadronic form factors are calculated using an SU(3) phenomenological Lagrangian approach for the proton, as well as several hyperons and charmed baryons. Since the decay of the neutralino is kinematically and CKM suppressed in this theoretical scenario, it decays outside the detector and appears experimentally only as missing energy. We detail the analysis techniques at the experimental level and estimate the background in the $$ {B}^{+}\to p{\overset{\sim }{\chi}}_1^0 $$ B + → p χ ~ 1 0 search using published results for $$ {B}^{+}\to {K}^{+}\nu \overline{\nu} $$ B + → K + ν ν ¯ . Our final sensitivity plots are shown for both $$ {\lambda}_{113}^{\prime \prime } $$ λ 113 ′ ′ versus the squark mass $$ {m}_{\tilde{q}} $$ m q ~ and $$ {\lambda}_{113}^{\prime \prime }/{m}_{\tilde{q}}^2 $$ λ 113 ′ ′ / m q ~ 2 versus the neutralino mass $$ {m}_{{\overset{\sim }{\chi}}_1^0} $$ m χ ~ 1 0 . We find that the search at Belle II could probe $$ {\lambda}_{113}^{\prime \prime }/{m}_{\tilde{q}}^2 $$ λ 113 ′ ′ / m q ~ 2 down to the order of 10−8 GeV−2 in the kinematically allowed $$ {m}_{{\overset{\sim }{\chi}}_1^0} $$ m χ ~ 1 0 range. We also obtain current limits on $$ {\lambda}_{123}^{\prime \prime } $$ λ 123 ′ ′ by recasting an existing search interpreted as $$ {B}^0\to {\Lambda}^0{\overset{\sim }{\chi}}_1^0 $$ B 0 → Λ 0 χ ~ 1 0 , and comment about searches for $$ {B}^{+}\to {\Sigma}^{+}{\overset{\sim }{\chi}}_1^0 $$ B + → Σ + χ ~ 1 0 , $$ {B}^0\to {\Sigma}^0{\chi}_1^0 $$ B 0 → Σ 0 χ 1 0 , $$ {B}^{+}\to {\Lambda}_c^{+}{\overset{\sim }{\chi}}_1^0 $$ B + → Λ c + χ ~ 1 0 , and $$ {B}^{+}\to {\Xi}_c^{+}{\overset{\sim }{\chi}}_1^0 $$ B + → Ξ c + χ ~ 1 0 . In closing, we briefly discuss potential searches at the LHCb and BESIII experiments.

show abstract

“…For past studies of LLPs at Belle II, see, e.g., refs. [63][64][65][66][67][68][69][70][71][72][73]. Experimental LLP searches conducted at BaBar and Belle appear in refs.…”

Section: Introductionmentioning

confidence: 99%

Probing charged lepton flavor violation with axion-like particles at Belle II

Cheung

Soffer

Wang

et al. 2021

J. High Energ. Phys.

View full text Add to dashboard Cite

We study charged lepton flavor violation associated with a light leptophilic axion-like particle (ALP), X, at the B-factory experiment Belle II. We focus on production of the ALP in the tau decays τ → Xl with l = e, μ, followed by its decay via X → l−l+. The ALP can be either promptly decaying or long-lived. We perform Monte-Carlo simulations, recasting a prompt search at Belle for lepton-flavor-violating τ decays, and propose a displaced-vertex (DV) search. For both types of searches, we derive the Belle II sensitivity reaches in both the product of branching fractions and the ALP coupling constants, as functions of the ALP mass and lifetime. The results show that the DV search exceeds the sensitivity reach of the prompt search to the relevant branching fractions by up to about a factor of 40 in the long decay length regime.

show abstract

Probing sterile neutrinos in B (D) meson decays at Belle II (BESIII)

Cited by 11 publications

References 115 publications

Highlights of BESIII Physics

Highlights of BESIII Physics

Probing R-parity violation in B-meson decays to a baryon and a light neutralino

Probing charged lepton flavor violation with axion-like particles at Belle II

Contact Info

Product

Resources

About