🇦🇺PhD Scholarships in Astrophysics🇦🇺
Institution
University of Melbourne
Department
School of Physics
Number of Positions Available
10
Work Arrangement
In-Person
In-Person Location(s)
Parkville VIC
Australia
Job Denoscription
We invite applications from exceptionally talented students planning a PhD in astrophysics or cosmology for PhD scholarships at the University of Melbourne.
The University of Melbourne is engaged in cutting edge research in observational and theoretical astrophysics, cultural and Indigenous astronomy, high energy astrophysics and transients, state of the art simulations of the early Universe, LIGO gravitational wave analysis, high-redshift galaxies, the cosmic microwave background, and 21 cm observations. The group leads SpIRIT - the first mission of the Australian Space Agency which launched in 2023 and will detect and study high energy transients and gravitational wave counterparts. The group also hosts nodes of two research centres, OzGRAV and ASTRO-3D.
The scholarships come with a tax-free stipend of AUD$37,000/yr (in 2024) for 3.5 years.
Applicants should submit an Expression of Interest through the link, including a statement of research interests, CV, trannoscripts if possible, and two reference letters by July 26 (this deadline is for international students). Successful candidates will be supported through the formal U. Melbourne application process.
Established in 1853, the University of Melbourne helps graduates become well-rounded, thoughtful and skilled professionals who make a positive impact across the globe. It's consistently ranked among the leading universities in the world, with international rankings placing it as #1 in Australia and #31 in the world (THE World Rankings 2021). Our research helps solve challenges the world is facing today and into the future. We're tightly connected with our communities, at home and around the globe; a connection that enriches our learning, teaching and research. The University of Melbourne offers an unsurpassed learning experience on an urban campus located on the edge of downtown Melbourne. Melbourne, a bustling metropolis of around 5 million people, frequently stars on lists of the most liveable cities in the world.
Compensation and Benefits
Compensation Type
Salary
Currency
323
Stipend
$37,000.00AUD
Application Details
Link to Online Application
https://forms.gle/NDsySwincyCJQyjj7
Publication Start Date
2024 Jun 27
Application Deadline
2024 Jul 26
Inquiries
Name
Astrophysics Selection Panel
Email
astrophysics@lists.unimelb.edu.au
Institution
University of Melbourne
Department
School of Physics
Number of Positions Available
10
Work Arrangement
In-Person
In-Person Location(s)
Parkville VIC
Australia
Job Denoscription
We invite applications from exceptionally talented students planning a PhD in astrophysics or cosmology for PhD scholarships at the University of Melbourne.
The University of Melbourne is engaged in cutting edge research in observational and theoretical astrophysics, cultural and Indigenous astronomy, high energy astrophysics and transients, state of the art simulations of the early Universe, LIGO gravitational wave analysis, high-redshift galaxies, the cosmic microwave background, and 21 cm observations. The group leads SpIRIT - the first mission of the Australian Space Agency which launched in 2023 and will detect and study high energy transients and gravitational wave counterparts. The group also hosts nodes of two research centres, OzGRAV and ASTRO-3D.
The scholarships come with a tax-free stipend of AUD$37,000/yr (in 2024) for 3.5 years.
Applicants should submit an Expression of Interest through the link, including a statement of research interests, CV, trannoscripts if possible, and two reference letters by July 26 (this deadline is for international students). Successful candidates will be supported through the formal U. Melbourne application process.
Established in 1853, the University of Melbourne helps graduates become well-rounded, thoughtful and skilled professionals who make a positive impact across the globe. It's consistently ranked among the leading universities in the world, with international rankings placing it as #1 in Australia and #31 in the world (THE World Rankings 2021). Our research helps solve challenges the world is facing today and into the future. We're tightly connected with our communities, at home and around the globe; a connection that enriches our learning, teaching and research. The University of Melbourne offers an unsurpassed learning experience on an urban campus located on the edge of downtown Melbourne. Melbourne, a bustling metropolis of around 5 million people, frequently stars on lists of the most liveable cities in the world.
Compensation and Benefits
Compensation Type
Salary
Currency
323
Stipend
$37,000.00AUD
Application Details
Link to Online Application
https://forms.gle/NDsySwincyCJQyjj7
Publication Start Date
2024 Jun 27
Application Deadline
2024 Jul 26
Inquiries
Name
Astrophysics Selection Panel
astrophysics@lists.unimelb.edu.au
🇦🇹 PhD and Postdoc Positions in Lorentzian Geometry/General Relativity/Metric Geometry, Vienna, Austria 🇦🇹
Contact: ef-applications.mathematics[AT]univie.ac.at
Location: Vienna, Austria
We are seeking to fill up to five PhD and four Postdoc positions within the research project
A new Geometry for Einstein’s Theory of Relativity and beyond
The project is situated at the intersection of Lorentzian Geometry, General Relativity, Metric Geometry and Optimal Transport, and has received major funding by the Austrian Science Fund (FWF) in the framework of its “Emerging Fields” program.
We are looking for exceptional candidates with a strong background in at least one, preferably several, of the following fields: Riemannian/Lorentzian geometry, functional analysis and measure theory, optimal transport, metric geometry, calculus of variations, geometric analysis, mathematical General Relativity.
https://ef-geometry.univie.ac.at/call-for-praedoc-and-postdoc-positions/
Contact: ef-applications.mathematics[AT]univie.ac.at
Location: Vienna, Austria
We are seeking to fill up to five PhD and four Postdoc positions within the research project
A new Geometry for Einstein’s Theory of Relativity and beyond
The project is situated at the intersection of Lorentzian Geometry, General Relativity, Metric Geometry and Optimal Transport, and has received major funding by the Austrian Science Fund (FWF) in the framework of its “Emerging Fields” program.
We are looking for exceptional candidates with a strong background in at least one, preferably several, of the following fields: Riemannian/Lorentzian geometry, functional analysis and measure theory, optimal transport, metric geometry, calculus of variations, geometric analysis, mathematical General Relativity.
https://ef-geometry.univie.ac.at/call-for-praedoc-and-postdoc-positions/
ef-geometry.univie.ac.at
Call for praedoc (PhD students) and postdoc positions – A new Geometry for Einstein’s Theory of Relativity & Beyond
Emerging Fields project - A new Geometry for Einstein’s Theory of Relativity & Beyond. This project is funded by the FWF and based at the Faculty of Mathematics of the University of Vienna
Journal Club: Experiments & Phenomenology / Hybrid format
Date:
Monday, Jul 1, 2024 / دوشنبه، 11 تیر 1403
Time:
11:00 AM - 12:00 PM (Tehran time)
Speaker:
Dr. Saeedeh Afhami
Affiliation:
Iranian Light Source Facility & School of Particles and Accelerators, IPM
Title:
Non-Evapourable Getters Coating, a novel route to achieve ultra high vacuum
Title in Persian:
لایه نشانی جاذب های غیر تبخیری، مسیری جدید برای دستیابی به خلاء بسیار بالا
Abstract:
The search for an effective solution to the problem of pumping conductance-limited vacuum systems, as those for particle accelerators, lead, at the end of 1995, to the start of the development of Non-Evaporable Getters (NEG) thin film coatings at CERN. Coating the whole inner surface of a vacuum chamber, after dissolving the NEG oxide layer by heating (activation), transforms it from a source of
gas into a pump providing very high pumping speed per unit length. In this talk, we will present the NEG physics and also describe how discharge voltage, magnetic field strength, and pressure effect on the deposition rate.
Based on: https://arxiv.org/pdf/2006.01537
Meeting Place: Seminar Room, School of Particles and Accelerators, IPM
Link to Join Virtually: https://meet.google.com/bda-vsem-tuv
Date:
Monday, Jul 1, 2024 / دوشنبه، 11 تیر 1403
Time:
11:00 AM - 12:00 PM (Tehran time)
Speaker:
Dr. Saeedeh Afhami
Affiliation:
Iranian Light Source Facility & School of Particles and Accelerators, IPM
Title:
Non-Evapourable Getters Coating, a novel route to achieve ultra high vacuum
Title in Persian:
لایه نشانی جاذب های غیر تبخیری، مسیری جدید برای دستیابی به خلاء بسیار بالا
Abstract:
The search for an effective solution to the problem of pumping conductance-limited vacuum systems, as those for particle accelerators, lead, at the end of 1995, to the start of the development of Non-Evaporable Getters (NEG) thin film coatings at CERN. Coating the whole inner surface of a vacuum chamber, after dissolving the NEG oxide layer by heating (activation), transforms it from a source of
gas into a pump providing very high pumping speed per unit length. In this talk, we will present the NEG physics and also describe how discharge voltage, magnetic field strength, and pressure effect on the deposition rate.
Based on: https://arxiv.org/pdf/2006.01537
Meeting Place: Seminar Room, School of Particles and Accelerators, IPM
Link to Join Virtually: https://meet.google.com/bda-vsem-tuv
Seminar / Virtual format
Date:
Wednesday, Jul 3, 2024 / چهارشنبه، 13 تیر 1403
Time:
11:00 AM - 12:00 PM (Tehran time)
Speaker:
Mr. Mohammad Aghaie
Affiliation:
University of Pisa and INFN sezione di Pisa
Title:
Minimal Dark Matter and its Indirect Detection
Title in Persian:
مدل ماده تاریک مینیمال و شناسایی غیرمستقیم آن
Abstract:
In this study, we investigate the sensitivity of the Cherenkov Telescope Array (CTA) and Fermi Large Area Telescope (Fermi-LAT) to dark matter (DM) annihilation in γ-ray lines. We focus on observations of the Galactic Center (GC), dwarf Spheroidal galaxies (dSphs), and galaxy clusters (GCls). Specifically, we compare the reach of the GC with that of dSphs, considering the poorly known putative core radius of the DM distribution. Surprisingly, we find that the currently best dSph candidates present a more promising target than the GC, especially for core radii ranging from one to a few kiloparsecs.
In addition to CTA prospects, we extend our analysis to incorporate Fermi-LAT data. Recent advancements in computations have highlighted the impact of Sommerfeld enhancement and bound-state formation on the annihilation cross section of Minimal Dark Matter (MDM) multiplets. Exploring this new paradigm, we examine Fermi-LAT data to assess its capability to detect or rule out a potential line arising from bound-state formation processes. Our findings reveal that the Fermi-LAT data effectively rules out the MDM 5plet at a significance level of 2σ, demonstrating the importance of considering enhanced cross sections and new annihilation signatures in the quest to unravel the mysteries of dark matter.
Indico Link: https://indico.hep.ipm.ir/e/m.aghaie
Meeting Place: Seminar Room, School of Particles and Accelerators, IPM
Link to Join Virtually: https://meet.google.com/bda-vsem-tuv
Date:
Wednesday, Jul 3, 2024 / چهارشنبه، 13 تیر 1403
Time:
11:00 AM - 12:00 PM (Tehran time)
Speaker:
Mr. Mohammad Aghaie
Affiliation:
University of Pisa and INFN sezione di Pisa
Title:
Minimal Dark Matter and its Indirect Detection
Title in Persian:
مدل ماده تاریک مینیمال و شناسایی غیرمستقیم آن
Abstract:
In this study, we investigate the sensitivity of the Cherenkov Telescope Array (CTA) and Fermi Large Area Telescope (Fermi-LAT) to dark matter (DM) annihilation in γ-ray lines. We focus on observations of the Galactic Center (GC), dwarf Spheroidal galaxies (dSphs), and galaxy clusters (GCls). Specifically, we compare the reach of the GC with that of dSphs, considering the poorly known putative core radius of the DM distribution. Surprisingly, we find that the currently best dSph candidates present a more promising target than the GC, especially for core radii ranging from one to a few kiloparsecs.
In addition to CTA prospects, we extend our analysis to incorporate Fermi-LAT data. Recent advancements in computations have highlighted the impact of Sommerfeld enhancement and bound-state formation on the annihilation cross section of Minimal Dark Matter (MDM) multiplets. Exploring this new paradigm, we examine Fermi-LAT data to assess its capability to detect or rule out a potential line arising from bound-state formation processes. Our findings reveal that the Fermi-LAT data effectively rules out the MDM 5plet at a significance level of 2σ, demonstrating the importance of considering enhanced cross sections and new annihilation signatures in the quest to unravel the mysteries of dark matter.
Indico Link: https://indico.hep.ipm.ir/e/m.aghaie
Meeting Place: Seminar Room, School of Particles and Accelerators, IPM
Link to Join Virtually: https://meet.google.com/bda-vsem-tuv
Indico
Wednesday weekly meeting
Weekly general meeting of the school of particles and accelerators (virtual) Link to join: https://meet.google.com/bda-vsem-tuv
Forwarded from Theoretical_Physics (Ghadir Jafari)
اثر امپمبا به این مشاهده گفته میشود که آب گرم زود تر از آب سرد یخ میزند. این پدیده به خاطر اراستو امپمبا تازانیایی نامگذاری شده است که اولین بار به عنوان یک دانشآموز در مدرسه در سال ۱۹۶۳ این مشاهده را انجام داده است.
هر چند روی وجود این پدیده و شرایط آن هنوز اختلاف نظرهایی وجود دارد اما توضیحات مختلفی هم برای وجود دارد.
در هفته گذشته سه مقاله در مجله prl چاپ شده که ورژن کوانتومی این پدیده را بررسی کرده اند و چالش های جدیدی را برای ترمودینامیک کوانتومی به وجود آورده است.
Observing the Quantum Mpemba Effect in Quantum Simulations
https://journals.aps.org/prl/abstract/10.1103/PhysRevLett.133.010402
Microscopic Origin of the Quantum Mpemba Effect in Integrable Systems
https://journals.aps.org/prl/abstract/10.1103/PhysRevLett.133.010401
Inverse Mpemba Effect Demonstrated on a Single Trapped Ion Qubit
https://journals.aps.org/prl/abstract/10.1103/PhysRevLett.133.010403
خلاصه را در خبر زیر می توانید ببینید:
Exploring Quantum Mpemba Effects
https://physics.aps.org/articles/v17/105
هر چند روی وجود این پدیده و شرایط آن هنوز اختلاف نظرهایی وجود دارد اما توضیحات مختلفی هم برای وجود دارد.
در هفته گذشته سه مقاله در مجله prl چاپ شده که ورژن کوانتومی این پدیده را بررسی کرده اند و چالش های جدیدی را برای ترمودینامیک کوانتومی به وجود آورده است.
Observing the Quantum Mpemba Effect in Quantum Simulations
https://journals.aps.org/prl/abstract/10.1103/PhysRevLett.133.010402
Microscopic Origin of the Quantum Mpemba Effect in Integrable Systems
https://journals.aps.org/prl/abstract/10.1103/PhysRevLett.133.010401
Inverse Mpemba Effect Demonstrated on a Single Trapped Ion Qubit
https://journals.aps.org/prl/abstract/10.1103/PhysRevLett.133.010403
خلاصه را در خبر زیر می توانید ببینید:
Exploring Quantum Mpemba Effects
https://physics.aps.org/articles/v17/105
Wednesday Weekly Seminar – Hybrid Format
Date:
Wednesday, July 10, 2024 / چهارشنبه، 20 تیر 1403
Time:
11:00 AM - 12:00 PM (Tehran time)
Speaker:
Dr. Hamed Abdolmaleki
Affiliation:
Malayer University & IPM
Title:
Exploring SMEFT Couplings Using the Forward-Backward Asymmetry in Neutral Current Drell-Yan Production at the LHC
Title in Persian:
بررسی کوپلینگهای نظریه میدانهای موثر مدل استاندارد در شتابدهنده بزرگ هادرونی
Abstract:
Neutral current Drell-Yan (DY) lepton-pair production is considered in the framework of the Standard Model Effective Field Theory (SMEFT). Using the open-source fit platform xFitter, we investigate the impact of high-statistics measurements of the neutral current DY (NCDY) forward-backward asymmetry AFB near the weak boson mass scale in the present and forthcoming stages of the Large Hadron Collider (LHC). Besides recovering earlier results on the AFB sensitivity to parton distribution functions, we analyze the precision determination of Z-boson couplings to left-handed and right-handed u-quarks and d-quarks, and explore Beyond-Standard-Model contributions using the SMEFT framework. We comment on the role of the AFB asymmetry for the electroweak SMEFT fit and precision Z-boson physics at the LHC and high-luminosity HL-LHC.
Indico Link: https://indico.hep.ipm.ir/e/h.abdolmaleki2
Meeting Place: Seminar Room, School of Particles and Accelerators, IPM
Link to Join Virtually: https://meet.google.com/bda-vsem-tuv
Date:
Wednesday, July 10, 2024 / چهارشنبه، 20 تیر 1403
Time:
11:00 AM - 12:00 PM (Tehran time)
Speaker:
Dr. Hamed Abdolmaleki
Affiliation:
Malayer University & IPM
Title:
Exploring SMEFT Couplings Using the Forward-Backward Asymmetry in Neutral Current Drell-Yan Production at the LHC
Title in Persian:
بررسی کوپلینگهای نظریه میدانهای موثر مدل استاندارد در شتابدهنده بزرگ هادرونی
Abstract:
Neutral current Drell-Yan (DY) lepton-pair production is considered in the framework of the Standard Model Effective Field Theory (SMEFT). Using the open-source fit platform xFitter, we investigate the impact of high-statistics measurements of the neutral current DY (NCDY) forward-backward asymmetry AFB near the weak boson mass scale in the present and forthcoming stages of the Large Hadron Collider (LHC). Besides recovering earlier results on the AFB sensitivity to parton distribution functions, we analyze the precision determination of Z-boson couplings to left-handed and right-handed u-quarks and d-quarks, and explore Beyond-Standard-Model contributions using the SMEFT framework. We comment on the role of the AFB asymmetry for the electroweak SMEFT fit and precision Z-boson physics at the LHC and high-luminosity HL-LHC.
Indico Link: https://indico.hep.ipm.ir/e/h.abdolmaleki2
Meeting Place: Seminar Room, School of Particles and Accelerators, IPM
Link to Join Virtually: https://meet.google.com/bda-vsem-tuv
Indico
Wednesday weekly meeting
General weekly meeting of the school of particles and accelerators (hybrid format) Meeting Place: Seminar Room, School of Particles and Accelerators, IPM Link to join virtually: https://meet.google.com/bda-vsem-tuv
☘ پیاده سازی شبکه های عصبی در TensorFlow (و PyTorch):
راهنمای گام به گام جهت ساخت شبکه عصبی ☘
لینک گزارش
@PDATLAB
راهنمای گام به گام جهت ساخت شبکه عصبی ☘
لینک گزارش
@PDATLAB
Towards Data Science
Implementing Neural Networks in TensorFlow (and PyTorch) | Towards Data Science
Step-by-step code guide on building a Neural Network
Physics Department
Sharif University of Technology
Cosmology Group Weekly Seminars
Seminar 1: Investigating the Homogeneity and Isotropy of the Universe with Large-scale Structure Data and the Consistency of our Motion to CMB
Arefe Rasouli
Department of Physics, Sharif University of Technology
Seminar 2: The study of the Kinematic and Clustering dipole using cosmological large-scale structure data
Haniyeh Tadayoni
Department of Physics, Sharif University of Technology
Seminar 3: How PBHs and NFW dark matter halos change the number of strongly lensed GW events?
Nooshin Torabi
Department of Physics, Sharif University of Technology
یکشنبه 24 تیر 1403، ساعت 10:00
Sunday 14 July 2024 – 10:00 Tehran Time
Hybrid Seminar
دانشکده فیزیک – طبقه پنجم – کلاس 512 Physics Department fifth floor – Room 512 /
https://vc.sharif.edu/ch/cosmology
گزینه ورود به صورت مهمان – Enter as a Guest
physics.sharif.edu/~cosmology/
Sharif University of Technology
Cosmology Group Weekly Seminars
Seminar 1: Investigating the Homogeneity and Isotropy of the Universe with Large-scale Structure Data and the Consistency of our Motion to CMB
Arefe Rasouli
Department of Physics, Sharif University of Technology
Seminar 2: The study of the Kinematic and Clustering dipole using cosmological large-scale structure data
Haniyeh Tadayoni
Department of Physics, Sharif University of Technology
Seminar 3: How PBHs and NFW dark matter halos change the number of strongly lensed GW events?
Nooshin Torabi
Department of Physics, Sharif University of Technology
یکشنبه 24 تیر 1403، ساعت 10:00
Sunday 14 July 2024 – 10:00 Tehran Time
Hybrid Seminar
دانشکده فیزیک – طبقه پنجم – کلاس 512 Physics Department fifth floor – Room 512 /
https://vc.sharif.edu/ch/cosmology
گزینه ورود به صورت مهمان – Enter as a Guest
physics.sharif.edu/~cosmology/
🇬🇧🇯🇵 Postdoc in GW Astronomy, Cardiff, UK and Tokyo, Japan 🇬🇧🇯🇵
The Institute for Cosmic Ray Research hosts the large-scale cryogenic gravitational-wave telescope KAGRA and is actively involved in instrumental design and commissioning, and gravitational-wave data analysis (Hideyuki Tagoshi, Soichiro Morisaki).
The post is full-time and fixed term until March 2027 with a flexible start date.
Salary: 39,347 GBP per annum (Grade 6.32).
IMPORTANT NOTE TO CANDIDATES: It is the University’s policy to use the person specification as a key tool for short-listing and we only invite candidates to interview who clearly evidence that they meet (or partially meet) each of the essential criteria. During the application process you will be asked to attach a supporting statement. This statement must outline how you meet the criteria below and we recommended formatting this by using each criteria as a sub-heading and providing your relevant experience/evidence below each sub-heading. It is crucial that you save your supporting statement with the vacancy number (eg. 1234BR) in the filename as failure to do so may result in it being omitted from your application.
For informal enquiries about the post please contact Vivien Raymond (raymondv[AT]cardiff.ac.uk), Soichiro Morisaki (soichiro[AT]icrr.u-tokyo.ac.jp)
For informal enquiries about working at Cardiff School of Physics and Astronomy please contact PhysicsHR[AT]cardiff.ac.uk
Job Reference: 18835BR
Link to Online Application: https://krb-sjobs.brassring.com/TGnewUI/Search/Home/Home?partnerid=30011&siteid=5460#jobDetails=2169999_5460
Closing date: Tuesday, 20 August 2024
Please be aware that Cardiff University reserves the right to close this vacancy early should sufficient applications be received.
The Institute for Cosmic Ray Research hosts the large-scale cryogenic gravitational-wave telescope KAGRA and is actively involved in instrumental design and commissioning, and gravitational-wave data analysis (Hideyuki Tagoshi, Soichiro Morisaki).
The post is full-time and fixed term until March 2027 with a flexible start date.
Salary: 39,347 GBP per annum (Grade 6.32).
IMPORTANT NOTE TO CANDIDATES: It is the University’s policy to use the person specification as a key tool for short-listing and we only invite candidates to interview who clearly evidence that they meet (or partially meet) each of the essential criteria. During the application process you will be asked to attach a supporting statement. This statement must outline how you meet the criteria below and we recommended formatting this by using each criteria as a sub-heading and providing your relevant experience/evidence below each sub-heading. It is crucial that you save your supporting statement with the vacancy number (eg. 1234BR) in the filename as failure to do so may result in it being omitted from your application.
For informal enquiries about the post please contact Vivien Raymond (raymondv[AT]cardiff.ac.uk), Soichiro Morisaki (soichiro[AT]icrr.u-tokyo.ac.jp)
For informal enquiries about working at Cardiff School of Physics and Astronomy please contact PhysicsHR[AT]cardiff.ac.uk
Job Reference: 18835BR
Link to Online Application: https://krb-sjobs.brassring.com/TGnewUI/Search/Home/Home?partnerid=30011&siteid=5460#jobDetails=2169999_5460
Closing date: Tuesday, 20 August 2024
Please be aware that Cardiff University reserves the right to close this vacancy early should sufficient applications be received.
Brassring
Job Search Welcome | Cardiff University
Search for Internet job openings.
Forwarded from Particle Physics (Fatemeh Irani)
پژوهشگران در سرن، دقت اندازهگیری جرم کوارک بالا را به طور قابل توجهی افزایش دادهاند.
در سال ۱۹۹۵، زمانی که دانشمندان کوارک بالا را کشف کردند، جرم این ذره را بین 151 تا 197 GeV/c2 تخمین زدند که آن را به سنگینترین ذرهی بنیادیِ شناخته شده، تبدیل کرد. همچنین، از آنجاییکه این مقدار یک ورودی کلیدی برای محاسبات مدل استاندارد (برای پیشبینی پارامترهای مربوط به فرآیندهای نادر) بهشمار میآید، دقت اندازهگیری آن حائز اهمیت است.
اکنون کولبریشنهای CMS و ATLAS در LHC، با جمعآوری پانزده اندازهگیری مختلف، دقیقترین مقدار جرم کوارک بالا را تا به امروز، این مقدار گزارش کردهاند:
172.52 ±0.33 GeV/c2
https://physics.aps.org/articles/v17/s57
در سال ۱۹۹۵، زمانی که دانشمندان کوارک بالا را کشف کردند، جرم این ذره را بین 151 تا 197 GeV/c2 تخمین زدند که آن را به سنگینترین ذرهی بنیادیِ شناخته شده، تبدیل کرد. همچنین، از آنجاییکه این مقدار یک ورودی کلیدی برای محاسبات مدل استاندارد (برای پیشبینی پارامترهای مربوط به فرآیندهای نادر) بهشمار میآید، دقت اندازهگیری آن حائز اهمیت است.
اکنون کولبریشنهای CMS و ATLAS در LHC، با جمعآوری پانزده اندازهگیری مختلف، دقیقترین مقدار جرم کوارک بالا را تا به امروز، این مقدار گزارش کردهاند:
172.52 ±0.33 GeV/c2
https://physics.aps.org/articles/v17/s57
Physics
The Most Precise Value of the Top-Quark Mass to Date
Researchers at CERN have significantly increased the precision of the measured value of the top-quark mass, a key input for making standard-model calculations.