S Uma Sankar
Articles written in Pramana – Journal of Physics
Volume 54 Issue 1 January 2000 pp 27-33
Solar neutrino problem in light of super-Kamiokande data
I discuss the status of the accepted solutions to the solar neutrino problem in light of the super-Kamiokande data.
Volume 54 Issue 4 April 2000 pp 603-609
Three flavour oscillation interpretation of neutrino data
I consider the mixing of the three active neutrino flavours and obtain the constraints on the parameters of this mixing from the solar, atmospheric and reactor neutrino data.
Volume 67 Issue 4 October 2006 pp 655-663 Working Group 2: Neutrino And Astroparticle Physics
Physics possibilities at India-based Neutrino Observatory
In this talk I review the physics possible at India-based Neutrino Observatory (INO). I discuss the improvement in the precision of currently known quantities and the possibility measuring the presently unknown quantities.
Volume 67 Issue 4 October 2006 pp 735-742 Working Group 2: Neutrino And Astroparticle Physics
Working group report: Astroparticle and neutrino physics
Raj Gandhi Subhendra Mohanty Tarun Souradeep S Agarwalla K Bhattacharya B Brahmachari R Crittenden S Goswami P Ghoshal M Lindner H S Mani S Mitra S Pascoli S Panda R Rangarajan S Ray T Roy Choudhury R Saha S Sarkar A Srivastava R Sheth S Uma Sankar U Yajnik
The working group on astroparticle and neutrino physics at WHEPP-9 covered a wide range of topics. The main topics were neutrino physics at INO, neutrino astronomy and recent constraints on dark energy coming from cosmological observations of large scale structure and CMB anisotropy.
Volume 67 Issue 5 November 2006 pp 849-860
Working group report: Flavor physics and model building
M K Parida Nita Sinha B Adhikary B Allanach A Alok K S Babu B Brahmachari D Choudhury E J Chun P K Das A Ghosal D Hitlin W S Hou S Kumar H N Li E Ma S K Majee G Majumdar B Mishra G Mohanty S Nandi H Pas M K Parida S D Rindani J P Saha N Sahu Y Sakai S Sen C Sharma C D Sharma S Shalgar N N Singh S Uma Sankar N Sinha R Sinha F Simonetto R Srikanth R Vaidya
This is the report of flavor physics and model building working group at WHEPP-9. While activites in flavor physics have been mainly focused on
Volume 88 Issue 5 May 2017 Article ID 0079 Research Article
Physics potential of the ICAL detector at the India-based Neutrino Observatory (INO)
A KUMAR A M VINOD KUMAR ABHIK JASH AJIT K MOHANTY ALEENA CHACKO ALI AJMI AMBAR GHOSAL AMINA KHATUN AMITAVA RAYCHAUDHURI AMOL DIGHE ANIMESH CHATTERJEE ANKIT GAUR ANUSHREE GHOSH ASHOK KUMAR ASMITA REDIJ B SATYANARAYANA B S ACHARYA BRAJESH C CHOUDHARY C RANGANATHAIAH C D RAVIKUMAR CHANDAN GUPTA D INDUMATHI DALJEET KAUR DEBASISH MAJUMDAR DEEPAK SAMUEL DEEPAK TIWARI G RAJASEKARAN GAUTAM GANGOPADHYAY GOBINDA MAJUMDER H B RAVIKUMAR J B SINGH J S SHAHI JAMES LIBBY JYOTSNA SINGH K RAVEENDRABABU K K MEGHNA K R REBIN KAMALESH KAR KOLAHAL BHATTACHARYA LALIT M PANT M SAJJAD ATHAR M V N MURTHY MANZOOR A MALIK MD NAIMUDDIN MOHAMMAD SALIM MONOJIT GHOSH MOON MOON DEVI NABA K MONDAL NAYANA MAJUMDAR NITA SINHA NITALI DASH POMITA GHOSHAL POONAM MEHTA PRAFULLA BEHERA R KANISHKA RAJ GANDHI RAJESH GANAI RASHID HASAN S KRISHNAVENI S M LAKSHMI S K SINGH S S R INBANATHAN S UMA SANKAR SADIQ JAFER SAIKAT BISWAS SANJEEV KUMAR SANJIB KUMAR AGARWALLA SANDHYA CHOUBEY SATYAJIT SAHA SHAKEEL AHMED SHIBA PRASAD BEHERA SRUBABATI GOSWAMI SUBHASIS CHATTOPADHYAY SUDEB BHATTACHARYA SUDESHNA BANERJEE SUDESHNA DASGUPTA SUMANTA PAL SUPRATIK MUKHOPADHYAY SUSHANT RAUT SUVENDU BOSE SWAPNA MAHAPATRA TAPASI GHOSH TARAK THAKORE V K S KASHYAP V S SUBRAHMANYAM VENKTESH SINGH VINAY B CHANDRATRE VIPIN BHATNAGAR VIVEK M DATAR WASEEM BARI Y P VIYOGI
The upcoming 50 kt magnetized iron calorimeter (ICAL) detector at the India-based Neutrino Observatory (INO) is designed to study the atmospheric neutrinos and antineutrinos separately over a wide range of energies andpath lengths. The primary focus of this experiment is to explore the Earth matter effects by observing the energy and zenith angle dependence of the atmospheric neutrinos in the multi-GeV range. This study will be crucial toaddress some of the outstanding issues in neutrino oscillation physics, including the fundamental issue of neutrino mass hierarchy. In this document, we present the physics potential of the detector as obtained from realistic detector simulations.We describe the simulation framework, the neutrino interactions in the detector, and the expected responseof the detector to particles traversing it. The ICAL detector can determine the energy and direction of the muons to a high precision, and in addition, its sensitivity to multi-GeV hadrons increases its physics reach substantially. Itscharge identification capability, and hence its ability to distinguish neutrinos from antineutrinos, makes it an efficient detector for determining the neutrino mass hierarchy. In this report, we outline the analyses carried out for the determination of neutrino mass hierarchy and precision measurements of atmospheric neutrino mixing parameters at ICAL, and give the expected physics reach of the detector with 10 years of runtime. We also explore the potential of ICAL for probing new physics scenarios like CPT violation and the presence of magnetic monopoles.
Volume 94 All articles Published: 8 August 2020 Article ID 0118 Research Article
Hadron energy estimation from atmospheric neutrino events
The iron calorimeter (ICAL) at India-based neutrino observatory (INO) is designed to mainly observe the muons produced in the charged current interactions of atmospheric muon neutrinos and antineutrinos. The track of the muon is reconstructed using the hits they produce in the detector. From this track, the charge, the energy and the direction of the muon are estimated, which are used to do oscillation physics analysis. In a large fraction of events, a number of hadrons are also produced in addition to the muons. The charged hadrons also leave hits in the detector which can be utilised to estimate the hadron energy. In this work, we generate atmospheric neutrino events using two different neutrino event generators: NUANCE and GENIE. The generated events are passed through the Geant4 simulator of ICAL. In each case, we study the relation between hadron hits, defined to be the difference between the total number of hits and the muon track hits, and the hadron energy. We find that a non-negligible number of baryons are produced in atmospheric neutrino interactions. For $E_{had}$ < 5 GeV almost all the hadron energy is carried by these baryons. Finally, we formulate a procedure by which the hadron energy can be estimated from the number of hadron hits.
Volume 96, 2022
All articles
Continuous Article Publishing mode
Click here for Editorial Note on CAP Mode
© 2021-2022 Indian Academy of Sciences, Bengaluru.