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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)

Observation of $\Lambda_b^0 \to \Lambda_c^+ \bar{D}^{(*)0} K^-$ and $\Lambda_b^0 \to \Lambda_c^+ D_s^{*-}$ decays

2024 · ARTICLE · en

The decays Λb0→Λc+D¯(∗)0K− and Λb0→Λc+Ds∗− are observed for the first time, in proton-proton collision data at s=13TeV, corresponding to an integrated luminosity of 5.4fb−1 collected with the LHCb detector. Their ratios of branching fractions with respect to the Λb0→Λc+Ds− mode are measured to be B(Λb0→Λc+D¯0K−)B(Λb0→Λc+Ds−)=0.1908−0.0034+0.0036−0.0018+0.0016±0.0038,B(Λb0→Λc+D¯∗0K−)B(Λb0→Λc+Ds−)=0.589−0.017+0.018−0.018+0.017±0.012,B(Λb0→Λc+Ds∗−)B(Λb0→Λc+Ds−)=1.668±0.022−0.055+0.061, where the first uncertainties are statistical, the second systematic, and the third, for the Λb0→Λc+D¯(∗)0K− decays, are due to the uncertainties on the branching fractions of the Ds−→K−K+π− and D¯0→K+π− decay modes. The measured branching fractions probe factorization assumptions in effective theories and provide the normalization for future pentaquark searches in Λb0→Λc+D¯(∗)0K− decay channels.

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Measurement of $J/\psi$-pair production in $pp$ collisions at $\sqrt{s} = 13$ TeV and study of gluon transverse momentum-dependent PDFs

2024 · ARTICLE · en

The production cross-section of J/ψ pairs in proton-proton collisions at a centre-of-mass energy of s = 13 TeV is measured using a data sample corresponding to an integrated luminosity of 4.2 fb−1 collected by the LHCb experiment. The measurement is performed with both J/ψ mesons in the transverse momentum range 0 T 14 GeV/c and rapidity range 2.0 4.5. The cross-section of this process is measured to be 16.36 ± 0.28 (stat) ± 0.88 (syst) nb. The contributions from single-parton scattering and double-parton scattering are separated based on the dependence of the cross-section on the absolute rapidity difference ∆y between the two J/ψ mesons. The effective cross-section of double-parton scattering is measured to be σeff = 13.1 ± 1.8 (stat) ± 2.3 (syst) mb. The distribution of the azimuthal angle ϕCS of one of the J/ψ mesons in the Collins-Soper frame and the pT-spectrum of the J/ψ pairs are also measured for the study of the gluon transverse-momentum dependent distributions inside protons. The extracted values of ⟨cos 2ϕCS⟩ and ⟨cos 4ϕCS⟩ are consistent with zero, but the presence of azimuthal asymmetry at a few percent level is allowed.

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A model-independent measurement of the CKM angle γ in partially reconstructed B± → D*h± decays with D → K0Sh+h− (h = π, K)

2024 · ARTICLE · en

A measurement of CP-violating observables in B± → D*K± and B± → D*π± decays is made where the photon or neutral pion from the D* → Dγ or D* → Dπ0 decay is not reconstructed. The D meson is reconstructed in the self-conjugate decay modes, D → KS0π+π− or D → KS0K+K−. The distribution of signal yields in the D decay phase space is analysed in a model-independent way. The measurement uses a data sample collected in proton-proton collisions at centre-of-mass energies of 7, 8, and 13 TeV, corresponding to a total integrated luminosity of approximately 9 fb−1. The B± → D*K± and B± → D*π± CP-violating observables are interpreted in terms of hadronic parameters and the CKM angle γ, resulting in a measurement of γ = (92−17+21)°. The total uncertainty includes the statistical and systematic uncertainties, and the uncertainty due to external strong-phase inputs.

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Measurement of forward charged hadron flow harmonics in peripheral PbPb collisions at √𝑠𝑁⁢𝑁=5.02TeV with the LHCb detector

2024 · ARTICLE · en

Flow harmonic coefficients, 𝑣𝑛, which are the key to studying the hydrodynamics of the quark-gluon plasma (QGP) created in heavy-ion collisions, have been measured in various collision systems and kinematic regions and using various particle species. The study of flow harmonics in a wide pseudorapidity range is particularly valuable to understand the temperature dependence of the shear viscosity to entropy density ratio of the QGP. This paper presents the first LHCb results of the second- and the third-order flow harmonic coefficients of charged hadrons as a function of transverse momentum in the forward region, corresponding to pseudorapidities between 2.0 and 4.9, using the data collected from PbPb collisions in 2018 at a center-of-mass energy of 5.02 TeV. The coefficients measured using the two-particle angular correlation analysis method are smaller than the central-pseudorapidity measurements at ALICE and ATLAS from the same collision system but share similar features.

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Observation of strangeness enhancement with charmed mesons in high-multiplicity $p$Pb collisions at $\sqrt{s_{NN}} = 8.16$ TeV

2024 · ARTICLE · en

The production of prompt 𝐷+𝑠 and 𝐷+ mesons is measured by the LHCb experiment in proton-lead (𝑝⁢Pb) collisions in both the forward (1.5

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Curvature-bias corrections using a pseudomass method

2024 · ARTICLE · en

Momentum measurements for very high momentum charged particles, such as muons from electroweak vector boson decays, are particularly susceptible to charge-dependent curvature biases that arise from misalignments of tracking detectors. Low momentum charged particles used in alignment procedures have limited sensitivity to coherent displacements of such detectors, and therefore are unable to fully constrain these misalignments to the precision necessary for studies of electroweak physics. Additional approaches are therefore required to understand and correct for these effects. In this paper the curvature biases present at the LHCb detector are studied using the pseudomass method in proton-proton collision data recorded at centre of mass energy √(s)=13 TeV during 2016, 2017 and 2018. The biases are determined using Z→μ+μ-decays in intervals defined by the data-taking period, magnet polarity and muon direction. Correcting for these biases, which are typically at the 10-4 GeV-1 level, improves the Z→μ+μ- mass resolution by roughly 18% and eliminates several pathological trends in the kinematic-dependence of the mean dimuon invariant mass.

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Fraction of $\chi_c$ decays in prompt $J/\psi$ production measured in $p$Pb collisions at $\sqrt{s_{\it NN}} = 8.16$ TeV

2024 · ARTICLE · en

The fraction of 𝜒𝑐⁢1 and 𝜒𝑐⁢2 decays in the prompt 𝐽/𝜓 yield, 𝐹𝜒𝑐→𝐽/𝜓=𝜎𝜒𝑐→𝐽/𝜓/𝜎𝐽/𝜓, is measured by the LHCb detector in 𝑝⁢Pb collisions at √𝑠NN=8.16 TeV. The study covers the forward (1.5

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Search for CP violation in the phase space of $D^0 \to K_S^0 K^\pm \pi^\mp$ decays with the energy test

2024 · ARTICLE · en

A search for CP violation in D0→KS0K+π− and D0→KS0K−π+ decays is reported. The search is performed using an unbinned model-independent method known as the energy test that probes local CP violation in the phase space of the decays. The data analysed correspond to an integrated luminosity of 5.4 fb−1 collected in proton-proton collisions by the LHCb experiment at a centre-of-mass energy of s = 13 TeV, amounting to approximately 950 thousand and 620 thousand signal candidates for the D0→KS0K−π+ and D0→KS0K+π− modes, respectively. The method is validated using D0 → K−π+π−π+ and D0→KS0π+π− decays, where CP-violating effects are expected to be negligible, and using background-enhanced regions of the signal decays. The results are consistent with CP symmetry in both the D0→KS0K−π+ and the D0→KS0K+π− decays, with p-values for the hypothesis of no CP violation of 70% and 66%, respectively.

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Production of $\eta$ and $\eta^\prime$ mesons in $pp$ and $p$Pb collisions

2024 · ARTICLE · en

The production of 𝜂 and 𝜂′ mesons is studied in proton-proton and proton-lead collisions collected with the LHCb detector. Proton-proton collisions are studied at center-of-mass energies of 5.02 and 13TeV and proton-lead collisions are studied at a center-of-mass energy per nucleon of 8.16TeV. The studies are performed in center-of-mass (c.m.) rapidity regions 2.5

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Observation of $\Xi_b^0 \to \Xi_c^+ D_s^-$ and $\Xi_b^- \to \Xi_c^0 D_s^-$ decays

2024 · ARTICLE · en

The Ξb0→Ξc+Ds− and Ξb−→Ξc0Ds− decays are observed for the first time using proton-proton collision data collected by the LHCb experiment at a centre-of-mass energy of s=13TeV, corresponding to an integrated luminosity of 5.1fb−1. The branching fractions times the production cross-sections of Ξb baryons relative to that of Λb0 baryon are measured to be R(Ξb0Λb0)≡σ(Ξb0)σ(Λb0)×B(Ξb0→Ξc+Ds−)B(Λb0→Λc0Ds−)=(15.8±1.1±0.6±7.7)%,R(Ξb−Λb0)≡σ(Ξb−)σ(Λb0)×B(Ξb−→Ξc0Ds−)B(Λb0→Λc0Ds−)=(16.9±1.3±0.9±4.3)%, where the first uncertainties are statistical, the second systematic, and the third due to the uncertainties on the decay branching fractions of relevant charmed baryons. The masses of Ξb0 and Ξb− baryons are measured to be mΞb0=5791.12±0.60±0.45±0.24MeV/c2 and mΞb−=5797.02±0.63±0.49±0.29MeV/c2, where the uncertainties are statistical, systematic, and those due to charmed-hadron masses, respectively.

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Курсы (8)