Tata Institute of Fundamental Research

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19912026

most citedSciPy 1.0--Fundamental Algorithms for Scientific Computing in Python

40.2k citations

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Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.

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Showing 1997 · hep-phShow all

21 papers · 2 filters

hep-ph1997★ 2 cited

Supersymmetric theories with explicit R-parity violation

Probir Roy

$R_{p}$ and motivation for explicit $R\!\!\!/}_p$, MSSM $\to$ $ R\!\!\!/}_p$ MSSM, Bounds on $R /_{p}$ couplings, Collider-specific phenomenology, Cosmological implicati…

hep-ph1997★ 1 cited

Using Drell-Yan Processes to Probe Nucleon and Meson Structure Functions

R. S. Bhalerao, J. T. Londergan

We investigate how Drell-Yan processes can be used to measure the magnitude of flavor symmetry violation in the proton sea. We examine the utility of the following beams: protons,…

hep-ph1997

Aspects of hadronic $J / ψ$ production

K. Sridhar

In this talk, I start with a brief introduction to Non-Relativistic QCD (NRQCD) and its applications to quarkonium physics. This theory has provided a consistent framework for the…

hep-ph1997★ 4 cited

Recent Developments in String Theory: A Brief Review for Particle Physicists

Sunil Mukhi

At the present time, string theory (and its generalizations) remain relatively abstruse subjects to the particle phenomenologist and experimentalist. Yet, striking developments of…

hep-ph1997★ 33 cited

Enhanced Three-Body Decay of the Charged Higgs Boson

Ernest Ma, D. P Roy, Jose Wudka

If the charged Higgs boson H+ exists with mh < mt + mb, the conventional expectation is that it will decay dominantly into c s-bar and tau+ nu-tau. However, the three-body decay mo…

hep-ph1997★ 14 cited

Two-Particle Correlations and $B^{0} B ˉ^{0}$ Mixing

G. V. Dass, K. V. L. Sarma

We study the EPR correlation implied by the entangled wavefunction of the $B^{0} B ˉ^{0}$ pair created by the $Υ$ (4S) resonance. The analysis uses the basis provided by the mass eig…

hep-ph1997★ 1 cited

Polarised and Unpolarised Charmonium Production at Higher Orders in v

Sourendu Gupta, Prakash Mathews

We study the unpolarised and polarised hadro-production of charmonium in non-relativistic QCD (NRQCD) at low transverse momentum, including sufficiently higher orders in the relati…

hep-ph1997★ 6 cited

Lower Bound on the Pseudoscalar Mass in the Minimal Supersymmetric Standard Model

E. Keith, Ernest Ma, D. P. Roy

In the Higgs sector of the Minimal Supersymmetric Standard Model, the mass of the pseudoscalar $A$ is an independent parameter together with $tan β \equiv v_{2} / v_{1}$ . If $m_{A}$ is sma…

hep-ph1997★ 1 cited

Single Polarisation Asymmetries for Quarkonia in Non-relativistic QCD

Sourendu Gupta

We find that single spin asymmetries in NRQCD are non-vanishing in general. They are proportional to the imaginary parts of some non-perturbative matrix elements. With statistics o…

hep-ph1997★ 5 cited

Implications of the HERA Events for the R-Parity Breaking SUSY Signals at Tevatron

Monoranjan Guchait, D. P. Roy

The favoured R-parity violating SUSY scenarios for the anomalous HERA events correspond to top and charm squark production via the $λ_{131}^{'}$ and $λ_{121}^{'}$ couplings. In both case…

hep-ph1997★ 9 cited

Chi_1 and Polarisation Asymmetries for Quarkonia at High Orders in Non-relativistic QCD

Sourendu Gupta, Prakash Mathews

We study doubly polarised asymmetries of c-cbar and b-bbar mesons in hadro- and photo-production at low transverse momentum in non-relativistic QCD to high orders in the relative v…

hep-ph1997★ 1 cited

W + 1 jet to W + 0 jet Ratio at the Tevatron: A Hint of New Physics?

Debajyoti Choudhury, Sreerup Raychaudhuri, K. Sridhar

We interpret the reported disagreement between the measured ratio, R_{10}, of the W + 1 jet cross-section to the W + 0 jet cross-section at the Tevatron and the Standard Model (SM)…

hep-ph1997

h_c production at the Tevatron

K. Sridhar

Non-Relativistic QCD (NRQCD) has provided a consistent framework for the physics of quarkonia. The colour-octet Fock components predicted by NRQCD have important implications for t…

hep-ph1997

Factorization of the charge correlation function in $B^{0} B ˉ^{0}$ oscillations

G. V. Dass, K. V. L. Sarma

Extraction of the mass difference $Δ m$ from $B^{0} B ˉ^{0}$ oscillations involves tagging of bottom flavour at production and at decay. We show that the asymmetry between the unmixed…

hep-ph1997

phi-Meson Mass Modification in Heavy-Ion Collisions

R. S. Bhalerao, S. K. Gupta, P. Shukla

We recently presented a method of analyzing invariant-mass spectra of kaon pairs resulting from decay of $ϕ$ mesons produced in high-energy heavy-ion collisions. It can be used to…

hep-ph1997★ 13 cited

The Intrinsic Gluon Component of the Nucleon

Paul Hoyer, D. P. Roy

Using an intrinsic parton model we estimate the rough shape and size of the intrinsic gluon component of the nucleon, corresponding to an energy scale $Q$ of the order $\lqcd$. It…

hep-ph1997★ 2 cited

CP-Violating Correlations between Lepton-Charge and Jet-Charge in Z -> b\bar b events

G. V. Dass, K. V. L. Sarma

Correlations that signal direct CP violation in the bottom sector are suggested. They need data on $Z \to b b ˉ$ events which consist of a bottom hadron decay into an exclusive se…

hep-ph1997★ 6 cited

Higher Orders in the Colour-Octet Model of J/ψProduction

Sourendu Gupta, Prakash Mathews

We study the hadro- and photo-production of $c ˉ c$ and $b ˉ b$ mesons at low transverse momentum to high orders in the relative velocity of the pair, v, in non-relativistic QC…

hep-ph1997★ 7 cited

Is there Anomalous J/psi Suppression in Present-day Heavy-ion Collisions?

R. V. Gavai, Sourendu Gupta

We re-analyse the data on J/psi cross sections for proton-nucleus and nucleus-nucleus collisions obtained by the CERN experiments NA38, NA51 and NA50. Our systematic analysis of er…

hep-ph1997★ 6 cited

Apparent and Actual Shifts in Mass and Width of Phi Mesons Produced in Heavy-Ion Collisions

R. S. Bhalerao, S. K. Gupta

We present a method of analyzing invariant-mass spectra of kaon pairs resulting from decay of $ϕ$ mesons produced in high-energy heavy-ion collisions. It can be used to extract the…

hep-ph1997★ 170 cited

Light Higgsino Dark Matter

M. Drees, M M. Nojiri, D. P. Roy +1

We re-investigate the question whether a light higgsino-like neutralino is a viable Dark Matter candidate. To this end we compute the dominant one-loop corrections to the masses of…

Supersymmetric theories with explicit R-parity violation

Using Drell-Yan Processes to Probe Nucleon and Meson Structure Functions

Aspects of hadronic J/ψ production

Recent Developments in String Theory: A Brief Review for Particle Physicists

Enhanced Three-Body Decay of the Charged Higgs Boson

Two-Particle Correlations and B0Bˉ0 Mixing

Polarised and Unpolarised Charmonium Production at Higher Orders in v

Lower Bound on the Pseudoscalar Mass in the Minimal Supersymmetric Standard Model

Single Polarisation Asymmetries for Quarkonia in Non-relativistic QCD

Implications of the HERA Events for the R-Parity Breaking SUSY Signals at Tevatron

Chi_1 and Polarisation Asymmetries for Quarkonia at High Orders in Non-relativistic QCD

W + 1 jet to W + 0 jet Ratio at the Tevatron: A Hint of New Physics?

h_c production at the Tevatron

Factorization of the charge correlation function in B0Bˉ0 oscillations

phi-Meson Mass Modification in Heavy-Ion Collisions

The Intrinsic Gluon Component of the Nucleon

CP-Violating Correlations between Lepton-Charge and Jet-Charge in Z -> b\bar b events

Higher Orders in the Colour-Octet Model of J/ψProduction

Is there Anomalous J/psi Suppression in Present-day Heavy-ion Collisions?

Apparent and Actual Shifts in Mass and Width of Phi Mesons Produced in Heavy-Ion Collisions

Light Higgsino Dark Matter

Aspects of hadronic $J / ψ$ production

Two-Particle Correlations and $B^{0} B ˉ^{0}$ Mixing

Factorization of the charge correlation function in $B^{0} B ˉ^{0}$ oscillations