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Гущин Михаил Иванович

Факультет компьютерных наук

Профиль на hse.ru ↗ тел.: 27261
Публикаций
313
Языков
3
Наград
7
Конференций
1
Профиль Публикации (313) Курсы (8)

Профессиональные интересы

анализ данныхфизика высоких энергий

Должности

  • Заместитель заведующего лабораторией — Факультет компьютерных наук, Институт искусственного интеллекта и цифровых наук, Научно-учебная лаборатория методов анализа больших данных
  • Ведущий научный сотрудник — Факультет компьютерных наук, Институт искусственного интеллекта и цифровых наук, Научно-учебная лаборатория методов анализа больших данных
  • Доцент — Факультет компьютерных наук, Департамент больших данных и информационного поиска

Био

  • · Начал работать в НИУ ВШЭ в 2017 году.
  • · Научно-педагогический стаж: 8 лет.

Образование

  • 2020 · Кандидат наук: Московский физико-технический институт (национальный исследовательский университет)
  • 2019 · Аспирантура: Московский физико-технический институт (национальный исследовательский университет), специальность «Информатика и вычислительная техника»
  • 2015 · Магистратура: Московский физико-технический институт (государственный университет), специальность «Прикладные математика и физика», квалификация «Магистр»
  • 2013 · Бакалавриат: Московский физико-технический институт (государственный университет), специальность «Прикладные математика и физика», квалификация «Бакалавр»

Опыт работы

  • · 2014 - 2017: Исследователь-разработчик в OOO "Яндекс"

Награды и поощрения

  • · Благодарность первого проректора НИУ ВШЭ (август 2024)
  • · Благодарность НИУ ВШЭ (май 2024)
  • · Благодарность проректора НИУ ВШЭ (сентябрь 2022)
  • · Благодарность факультета компьютерных наук НИУ ВШЭ (август 2022)
  • · Надбавка за публикацию в журнале из Списка А (и приравненном к нему научном издании) (2025–2026, 2024–2025, 2023–2024)
  • · Надбавка за публикацию в международном рецензируемом научном издании (2022–2023, 2021–2022, 2020–2022, 2018–2019)
  • · Лучший преподаватель — 2024

Гранты и проекты

  • — · на соискание учёной степени кандидата наук

Конференции (1)

Показать все
  • · 2021: ACAT 2021 (Daejeon). Доклад: Robust Neural Particle Identification Models

Идентификаторы исследователя

Публикации (313)

Measurement of the CKM angle γ in B± → DK*(892)± decays

2025 · ARTICLE · en

Measurements of CP observables and the CKM angle γ are performed in B± → DK*(892)± decays, where D represents a superposition of D0 and states, using the LHCb dataset collected during Run 1 (2011–2012) and Run 2 (2015–2018). A study of this channel is presented with the D meson reconstructed in two-body final states K±π∓, K+K− and π+π−; four-body final states K±π∓π±π∓ and π+π−π+π−; and three-body final states and . This analysis includes the first observation of the suppressed B± → [π±K∓]DK*± and B± → [π±K∓π±π∓]DK*± decays. The combined result gives γ = (63 ± 13)°

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Measurements of ψ(2S) and χc1(3872) production within fully reconstructed jets

2025 · ARTICLE · en

This paper presents the first measurement of ψ(2S) and χc1(3872) meson production within fully reconstructed jets. Each quarkonium state (tag) is reconstructed via its decay to the J/ψ(→μ+μ−)π+π− final state in the forward region using proton-proton collision data collected by the LHCb experiment at the center-of-mass-energy of 13TeV in 2016, corresponding to an integrated luminosity of 1.64fb−1. The fragmentation function, presented as the ratio of the quarkonium-tag transverse momentum to the full jet transverse momentum (pT(tag)/pT(jet)), is measured differentially in pT(jet) and pT(tag) bins. The distributions are separated into promptly produced quarkonia from proton-proton collisions and quarkonia produced from displaced b-hadron decays. While the displaced quarkonia fragmentation functions are in general well described by parton-shower predictions, the prompt quarkonium distributions differ significantly from fixed-order non-relativistic QCD (NRQCD) predictions followed by a QCD parton shower.

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Test of Lepton Flavor Universality with 𝐵0𝑠 →𝜙ℓ+ℓ− Decays

2025 · ARTICLE · en

Lepton flavor universality in rare 𝑏 →𝑠 transitions is tested for the first time using 𝐵0𝑠 meson decays. The measurements are performed using 𝑝⁢𝑝 collision data collected by the LHCb experiment between 2011 and 2018, corresponding to a total integrated luminosity of 9 fb−1. Branching fraction ratios between the 𝐵0𝑠→𝜙⁢𝑒+⁢𝑒− and 𝐵0𝑠 →𝜙⁢𝜇+⁢𝜇− decays are measured in three regions of dilepton mass squared, 𝑞2, with 0.1

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Search for B∗0(s)→μ+μ− in B+c→π+μ+μ− decays

2025 · ARTICLE · en

A search for the very rare B∗0→μ+μ− and B∗0s→μ+μ− decays is conducted by analysing the B+c→π+μ+μ− process. The analysis uses proton-proton collision data collected with the LHCb detector between 2011 and 2018, corresponding to an integrated luminosity of 9\,fb−1. The signal signatures correspond to simultaneous peaks in the μ+μ− and π+μ+μ− invariant masses. No evidence for an excess of events over background is observed for either signal decay mode. Upper limits at the 90% confidence level are set on the branching fractions relative to that for B+c→J/ψπ+ decays, B∗0(μ+μ−)π+/J/ψπ+

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First Determination of the Spin-Parity of Ξ𝑐(3055)+,0 Baryons

2025 · ARTICLE · en

The Ξ0⁢(−)𝑏→Ξ𝑐⁢(3055)+(0)⁢(→𝐷+(0)⁢Λ)⁢𝜋− decay chains are observed, and the spin-parity of Ξ𝑐⁢(3055)+(0) baryons is determined for the first time. The measurement is performed using proton-proton collision data at a center-of-mass energy of √𝑠 =13 TeV, corresponding to an integrated luminosity of 5.4 fb−1, recorded by the LHCb experiment between 2016 and 2018. The spin-parity of the Ξ𝑐⁢(3055)+(0) baryons is determined to be 3/2+ with a significance of more than 6.5⁢𝜎 (3.5⁢𝜎) compared to all other tested hypotheses. The up-down asymmetries of the Ξ0⁢(−)𝑏→Ξ𝑐⁢(3055)+(0)⁢𝜋− transitions are measured to be −0.92±0.10±0.05 (−0.92±0.16±0.22), consistent with maximal parity violation, where the first uncertainty is statistical and the second is systematic. These results support the hypothesis that the Ξ𝑐⁢(3055)+(0) baryons correspond to the first 𝐷-wave 𝜆-mode excitation of the Ξ𝑐 flavor triplet.

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Measurement of exclusive J / ψ and ψ ( 2 S ) production at √ s = 13 TeV

2025 · ARTICLE · en

Measurements are presented of the cross-section for the central exclusive production of J/ψ→μ+μ− and ψ(2S)→μ+μ− processes in proton-proton collisions at √s=13 TeV with 2016–2018 data. They are performed by requiring both muons to be in the LHCb acceptance (with pseudorapidity 2

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Measurement of CP violation in B0→D+D− and B0s→D+sD−s decays

2025 · ARTICLE · en

A time-dependent, flavour-tagged measurement of CP violation is performed with B0→D+D− and B0s→D+sD−s decays, using data collected by the LHCb detector in proton-proton collisions at a centre-of-mass energy of 13 TeV corresponding to an integrated luminosity of 6 fb−1. In B0→D+D− decays the CP-violation parameters are measured to be SD+D−CD+D−=−0.552±0.100(stat)±0.010(syst),=0.128±0.103(stat)±0.010(syst). In B0s→D+sD−s decays the CP-violating parameter formulation in terms of ϕs and |λ| results in ϕs|λD+sD−s|=−0.086±0.106(stat)±0.028(syst)rad,=1.145±0.126(stat)±0.031(syst). These results represent the most precise single measurement of the CP-violation parameters in their respective channels. For the first time in a single measurement, CP symmetry is observed to be violated in B0→D+D− decays with a significance exceeding six standard deviations.

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Measurement of 𝐷0−¯𝐷0 mixing and search for 𝐶𝑃 violation with 𝐷0→𝐾+𝜋− decays

2025 · ARTICLE · en

A measurement of the time-dependent ratio of the 𝐷0 →𝐾+⁢𝜋− to ¯𝐷0→𝐾+⁢𝜋− decay rates is reported. The analysis uses a sample of proton-proton collisions corresponding to an integrated luminosity of 6 fb−1 recorded by the LHCb experiment from 2015 through 2018 at a center-of-mass energy of 13 TeV. The 𝐷0 meson is required to originate from a 𝐷*⁢(2010)+→𝐷0⁢𝜋+ decay, such that its flavor at production is inferred from the charge of the accompanying pion. The measurement is performed simultaneously for the 𝐾+ 𝜋− and 𝐾− 𝜋+ final states, allowing both mixing and 𝐶⁢𝑃-violation parameters to be determined. The value of the ratio of the decay rates at production is determined to be 𝑅𝐾⁢𝜋=(343.1±2.0)×10−5. The mixing parameters are measured to be 𝑐𝐾⁢𝜋 =(51.4 ±3.5) ×10−4 and 𝑐′𝐾⁢𝜋=(13±4)×10−6, where √𝑅𝐾⁢𝜋⁢𝑐𝐾⁢𝜋 is the linear coefficient of the expansion of the ratio as a function of decay time in units of the 𝐷0 lifetime, and 𝑐′𝐾⁢𝜋 is the quadratic coefficient, both averaged between the 𝐾+ 𝜋− and 𝐾− 𝜋+ final states. The precision is improved relative to the previous best measurement by approximately 60%. No evidence for 𝐶⁢𝑃 violation is found.

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Observation of Exotic 𝐽/𝜓𝜙 Resonant Structure in Diffractive Processes in Proton-Proton Collisions

2025 · ARTICLE · en

The first study of 𝐽/𝜓⁢𝜙 production in diffractive processes in proton-proton collisions is presented. The study is based on an LHCb dataset recorded at center-of-mass energy of 13 TeV, corresponding to an integrated luminosity of 5 fb−1. The data disfavor a nonresonant 𝐽/𝜓⁢𝜙 production but are consistent with a resonant model including several resonant states observed previously only in 𝐵+→𝐽/𝜓⁢𝜙⁢𝐾+ decays. The 𝜒𝑐⁢0⁡(4500) state is observed with a significance over 6⁢𝜎 and the 𝜒𝑐⁢1⁡(4274) is confirmed with a significance of more than 4⁢𝜎.

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Amplitude analysis of B+ → ψ(2S)K+π+π− decays

2025 · ARTICLE · en

The first full amplitude analysis of B+ → ψ(2S)K+π+π− decays is performed using proton-proton collision data corresponding to an integrated luminosity of 9 fb−1 recorded with the LHCb detector. The rich K+π+π− spectrum is studied and the branching fractions of the resonant substructure associated with the prominent K1(1270)+ contribution are measured. The data cannot be described by conventional strange and charmonium resonances only. An amplitude model with 53 components is developed comprising 11 hidden-charm exotic hadrons. New production mechanisms for charged charmonium-like states are observed. Significant resonant activity with spin-parity JP = 1+ in the ψ(2S)π+ system is confirmed and a multi-pole structure is demonstrated. The spectral decomposition of the ψ(2S)π+π− invariant-mass structure, dominated by X0 → ψ(2S)ρ(770)0 decays, broadly resembles the J/ψϕ spectrum observed in B+ → J/ψϕK+ decays. Exotic ψ(2S)K+π− resonances are observed for the first time.

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Курсы (8)