# Amitava Datta

###### PhD:

###### Area of Interest:

###### Email ID:

###### Research Interest:

i) To analyze the feasibility of discovering various theoretically well motivated extensions of the standard model of particle physics in present and future accelerator based experiments - at the Large Hadron Collider at CERN in particular - through simulations and other studies.

ii) To develop a network of experimentalists and phenomenologists in India for this pur- pose. As a first step a joint DST research project in collaboration with Dr. Manas Maity, Visva Bharati University, a member of the CMS collaboration, is in progress. Such activities will be further augmented within the framework of the Regional Centre for Accelerator Based Particle Physics(RECAPP) at Harish Charndra Research Institute, Allahabad.

###### Academic Qualification:

- B.Sc. (Physics Honours), Scottish Church College, 1969
- M.Sc. (Physics), Visva Bharati, Shantiniketan, 1971
- Ph.D., Visva Bharati, Shantiniketan, 1974

###### Positions:

- Lecturer, Jadavpur University(1981-1987)
- Reader, Jadavpur University (1987-1998)
- Professor, Jadavpur University (1998-2000)
- Professor, Visva Bharati,shantiniketan (2000-2002)
- Professor, Jadavpur University (2002-2008)
- Professor, Indian Institute of Science, Education & Research (IISER), Kolkata (2008 -)

###### Awards and Honors:

- Alexander Von Humboldt Fellowship (1986)(Visited the Institute for Physics, University of Dortmund, Germany (1986-88); Follow-up visits 1994 (Dortmund), 2002 (Physikalisches Inst., Univ. of Bonn), 2004 (Dortmund), 2007(Bonn).
- Associate Member of the International Centre for Theortical Physics, Trieste, Italy (1991-1996).
- Associate Member of the Institute of Theortical Physics, Beijing, China, (1997-2000).
- Fellow of the Indian National Science Academy, New Delhi.

** Professional Services**

- Organized the international series of Workshops on High Energy Physics Phenomenology (WHEPP) in different capacities - Secretary of the National Organizing Committee(NOC) in 1991 and 1996, Member of the NOC in 1994,1998, 2000, Working Group Co-ordinator in 1989, 1994, 1998, 2002 and 2004.
- Member of the NOC DAE Symposium on High Energy Physics in 1994-95, 1996 and 1998.
- Member of the Programme Committee of the 21st international Workshop on Weak Inter- actions and Neutrinos (WIN07).
- Member of the Programme Advisory Committee, Regional Centre for Accelerator Based Particle Physics (RECAPP) at Harish Charndra Research Institute, Allahabad.

###### List of Publications:

- Enriching the exploration of the mUED model with event shape variables at the CERN LHC, Amitava Datta, Anindya Datta, Sujoy Poddar (To Appear in Phys. Lett. B).
- Revealing the footprints of squark gluino production through Higgs search experiments at the Large Hadron Collider at 7 TeV and 14 TeV, Biplob Bhattacherjee, Amitava Datta , JHEP 1203 (2012) 006.
- Low mass neutralino dark matter in mSUGRA and more general models in the light of LHC data, Nabanita Bhattacharyya, Arghya Choudhury, Amitava Datta

Phys. Rev. D 84, 095006 (2011). - Supersymmetry signals with small and large trilinear couplings at the LHC -7 TeV runs and neutralino dark matter, Nabanita Bhattacharyya, Arghya Choudhury and Amitava Datta, Phys. Rev. D 83,115025 (2011).
- The interplay between the charged Higgs and squark-gluino events at the LHC, Nabanita Bhattacharyya, Amitava Datta, Monoranjan Guchait, Manas Maity and Sujoy Poddar, Phys. Rev. D 82,035022 (2010).
- SUSY darkmatter at the LHC - 7 TeV, Nabanita Bhattacharyya, Amitava Datta, (IISER, Kolkata) , Sujoy Poddar, Phys. Rev. D 82, 035003 (2010).
- Tracking down the elusive charginos / neutralinos through tau leptons at the Large Hadron Collider, Nabanita Bhattacharyya, Amitava Datta, (IISER, Kolkata), Phys.Rev.D80:055016,2009.
- Probing R-parity violating models of neutrino mass at the LHC via top squark decays, A. Datta and S. Poddar, Phys. Rev.D 79, 075021,2009.
- Search for Top Squarks at Tevatron Inspired by Dark Matter and Electroweak Baryogenesis, Nabanita Bhattacharyya, Amitava Datta and Manas Maity, Phys.Lett.B669,311,2008.
- Lepton Flavours at the Early LHC Experiments as the Footprints of the Dark Matter Producing Mechanisms, Nabanita Bhattacharyya, Amitava Datta and Sujoy Poddar, Phys.Rev.D78:075030,2008.
- Associated Higgs production in CP-violating supersymmetry: Probing the 'open hole' at the large hadron collider, Priyotosh Bandyopadhyay, Amitava Datta, Aseshkrishna Datta and Biswarup Mukhopadhyaya, Phys.Rev.D78:015017,2008.
- Focus point SUSY at the LHC revisited (with S.P. Das, Manoranjan Guchait, Manas Maity, and Siddhartha Mukherjee), Eur. Phys. J. C54, 645 (2008).
- Non-zero trilinear parameter in the mSUGRA model - dark matter and collider signals at Tevatron and LHC (with Utpal Chattopadhyay, Debottam Das and Sujoy Poddar), Phys. Rev. D 75, 055008 (2007).
- New signals of a R-parity violating model of neutrino mass at the Tevatron (with Sujoy Poddar), Phys. Rev. D 75, 075013 (2007).
- Top squark and neutralino decays in a R-parity violating model constrained by neutrino oscillation data (with Siba Prasad Das and Sujoy Poddar), Phys. Rev. D 73, 075014 (2006).
- LEP data and the stability of the potential confronts the mSUGRA model (with A. Samanta), Phys. Lett. B607, 144 (2005).
- Rare weak decays and direct lepton number violating signals in a minimal R-parity violating model of neutrino mass (with J.P. Saha, A. Kundu and A.Samanta), Phys. Rev. D72, 055007 (2005).
- Are Light Sneutrinos Buried in LEP Data (with Aseshkrishna Datta), Phys. Lett. B578,165 (2004).
- R-Parity violatioin in B −> π
^{+}π^{−}decay (with Gautam Bhattacharyya and Anirban Kundu), J. Phys. G 30, 1947 (2004). - Probing R - Parity violating models of neutrino mass at the Tevatron via top squark decays (with S.P. Das and M. Guchait), Phys. Rev. D70, 015009 (2004).
- Top squark mass:current limits revisited and new limits from Tevatron Run I (with S.P.Das and M. Maity), Phys. Lett. B596, 293 (2004).
- Effects of SO(10) D-Term on Yukawa Unification and Unstable Minima of the Super- symmetric Scalar Potential (with A. Samanta), J. Phys. G 29, 272 (2003).
- Electroweak Precision Data, Light Sleptons and Stability of the SUSY Scalar Potential (with A.Samanta), Phys. Lett. B526, 111 (2002).
- Four Body Decay of the Stop Squark at the Upgraded Tevatron (with S.P. Das and M. Guchait), Phys. Rev. D65, 095006 (2002).
- Does CPT Violation Affect the Bd Meson Lifetimes and Decay Asymmetries? (with E.A. Paschos and L. P. Singh), Phys. Lett. B548, 146 (2002).
- Signatures of light down type squarks at the upgraded Tevatron (with Anindya Datta and S. Maity), J. Phys. G27, 1547 (2001).
- Testing the AMSB model via e
^{+}e^{−}→ χ^{+}− χ^{−}γ (with S. Maity), Phys. Lett. B513, 130 (2001). - Can R-parity violation lower sin2β (with G. Bhattacharyya and A. Kundu), Phys. Lett. B514, 47, (2001).
- New bounds on slepton and wino masses in anomaly mediated supersymmetry breaking models (with A. Kundu and A. Samanta), Phys. Rev. D64, 095016 (2001).
- Yukawa unification and unstable minima of the supersymmetric scalar potential (with A. Kundu and A. Samanta), Phys. Rev. D63, 015008 (2001).
- LHC signatures of the minmimal SUGRA model with a large soft scalar mass (with Utpal Chattopadhyay, Anindya Datta, A. K. Datta, and D. P. Roy), Phys. Lett. B 493, 127 (2000).
- Effects of SO(10) D terms on SUSY signals at the Fermilab Tevatron (with A.K.Datta, M. Drees and D.P. Roy), Phys. Rev. D61, 055003 (2000).
- On the observability of 'invisible'/'nearly invisible' charginos (with Shyamapada Maity), Phys. Rev. D59 , 055019 (1999).
- Efects of R - Parity violation on direct CP violation in B decyas and extraction of γ (with G. Bhattacharyya), Phys. Rev. Lett. 83, 2300 (1999).
- Virtual LSPs at e
^{+}− e^{−}colliders (with Asesh Krishna Datta and Sreerup Raychaudhuri), Eur. Phys. J.C1, 375 (1998). - Testing gauge - gravitino coupling in the gauge mediated supersymmetry breaking through single photon events (with Asesh Krishna Datta, A. Kundu, B. Mukhopadhyaya, and S. Roy), Phys. Lett. B416, 117 (1998).
- Signatures of nonuniversal soft breaking sfermion masses at hadron colliders (with Asesh Krishna Datta and M. K. Parida), Phys. Lett. B431, 347 (1998).
- Squark gluino mass limits revisited for nonuniversal scalar masses (with M. Guchait and N. Parua), Phys. Lett. B395, 54 (1997).
- Hunting virtual LSPs at LEP - II (with M. Drees and M. Guchait), Z. Phys. C. 69, 347 (1996).
- New particle searches haunted by virtual lightest supersymmetric particle’s (with M. Guchait and B. Mukhopadhyaya), Mod. Phys. Lett. A10, 1011 (1995).
- Signatures of virtual LSPs at the TEVATRON (with S. Chakraborti and M. Guchait), Z. Phys. C 68, 325 (1995).
- Observing virtual LSPs at LEP-II (with Asesh Datta and S. Raychaudhuri), Phys. Lett. B349, 113 (1995).
- Probing lepton number violation via Majorana neutrinos at hadron super colliders (with M. Guchait and A. Pilaftsis), Phys. Rev. D 50, 3195 (1994).
- Quark masses and mixing angles in a four-generation model with a naturally heavy neutrino (with S.Raychaudhuri), Phys. Rev. D49, 4762 (1994).
- Flavour democracy calls for the 4th generation, Pramana 40, L 503 (1993).
- Prospects of heavy right - handed neutrino search at SSC/LHC energies (with M. Guchait and D.P. Roy), Phys. Rev. D 47, 961 (1993).
- New bound on right - handed charged gauge boson mass (with G. Bhattacharyya, A. Raychaudhuri and U. Sarkar), Phys. Rev. D (RC) 47, 3693 (1993).
- Spontaneous CP violation within the framework of SU(2)
_{L}× SU(2)_{R}× U(1) models with manifest CP invarience revisited (with P.Basak), Int. J. of Mod. Phys. A7, 6325 (1992). - Z-decay constraints on supersymmetric particles revisited (with M. Guchait and A. Raychaudhuri), Z. Phys. C 54, 513 (1992).
- Revealing the Majorana nature of the heavy neutrinos via heavy Higgs bosons (with A. Pilaftsis), Phys. Lett. B 278, 162 (1992).
- CP violation in the Z
_{4}model with four generations (with P.Basak), Phys. Rev. D44, 865 (1991). - Is Bell type inequality violated for the K
^{0}− ¯K^{0}, B^{0}− ¯B^{0}.....systems (with D.Home), Foundations of Physics Letters 4, 165 (1991). - Can the M
^{0}− ¯M^{0}system distinguish between quantum mechanics and local realism?, Phys. Lett. A157, 449 (1991). - Z - Z
^{′}mixing in the extended gauge models from LEP 1990 data (with G. Bhattacharyya, S.N. Ganguli and A. Raychaudhuri), Mod. Phys. Lett. A6, 2557 (1991). - Bounds on mixing angles of fermions with their exotic partners using LEP 1990 data (with G. Bhattacharyya, S.N. Ganguli and A. Raychaudhuri), Mod. Phys. Lett. A6, 2921 (1991).
- Z decay confronts nonstandard scenarios (with G. Bhattacharyya, S.N. Ganguli and A. Raychaudhuri), Phys. Rev. Lett. 64, 2870 (1990).
- Quantum chromodynamic corrections for ΔF = 2 processes in the presence of a heavy top quark (with J.Frohlich and E.A. Paschos), Z. Phys. C46, 63 (1990).
- Do the data on W and Z decays already constrain the nonstandard physics? (with M. Drees, R.M. Godbole and X. Tata), Phys. Rev. D 37, 1876 (1988).
- Is quantum mechanics with CP nonconservation incompatible with Einstein’s locality condition at the statistical level? (with D. Home and A. Raychaudhuri), Phys. Lett. A130, 187 (1988).
- On the life time difference of the B mesons and its experimental detection (with E.A. Paschos and Y.L.WU), Nucl. Phys. B31, 35 (1988/89).
- Relative rates of W and Z events at the p¯p collider and nonstandard physics (with R.M. Godbole), Phys. Rev. D 37, 225 (1988).
- A curious gedanken example of the Einstein - Podolsky - Rosen Paradox using CP non- conservation (with D. Home and A. Raychaudhuri), Phys. Lett. A123, 4 (1987).
- Consequences of observed B
_{d}− ¯B_{d}mixing (with E.A. Paschos and U. Turke), Phys. Lett. B 196, 376 (1987). - Are there B
_{s}mesons with two different life times? (with E.A. Paschos and U. Turke), Phys. Lett. B 196, 382 (1987). - Δs = 2 processes in ETC theories with left - right symmetric electroweak sector (with A. Raychaudhuri), Z. Phys. C.32 591 (1986).
- Quantum non - seperability vs local realism : a new test using the B
_{0}− ¯B^{0}system (with D.Home), Phys. Lett. A119, 3 (1986). - Constraints on the squark mass matrix from CP violation and SUSY predictions for the B
^{0}− ¯B^{0}systems (with A. Ray and A. Raychaudhuri), Z. Phys. C.32 591 (1986). - Light gluinos and CP violation (with A. Ray and A. Raychaudhuri), Phys. Lett. B 176, 190 (1986).
- Corrections to the box diagram amplitude due to kaon mass (with D. Kumbhakar), Phys. Rev. D 33, 3461 (1986).
- Phenomenological bounds on flavour mixing contributions to the down squark mass ma trix (with P. Majumdar and A. Raychaudhuri), Phys. Rev. D 33, 280 (1986).
- D
^{0}− ¯D^{0}mixing: a possible test of physics beyond the standard model (with D. Kumbhakar), Z. Phys. C.27, 515 (1985). - D
^{0}− ¯D^{0}mixing: standard vs nonstandard scenarios, Phys. Lett. B 154, 287 (1985). - Testing the family replication model through B
^{0}− ¯B^{0}mixing (with J.C. Pati), Phys. Lett. B 164, 173 (1985). - Higgs boson induced flavour changing neutral currents and K
_{L}−K_{s}mass difference, A. Datta, Phys. Rev. D 30, 147 (1984). - Does a low mass right - handed gauge boson imply departure from manifest left right symmetry (with A. Raychaudhuri), Phys. Lett. B 122, 392 (1983).
- Low mass right handed gauge bosons, manifest left right symmetry and K
_{L}− K_{s}mass difference (with A. Raychaudhuri), Phys. Rev. D 28, 1170 (1983). - Quark masses in a BCS like approach using q¯q potentials (with J. Dey, M. Dey and P. Ghose), Z. Phys. C.19, 179 (1983).
- Left-right mixing in SU(2)
_{L}× SU(2)_{R}× U(1)- gauge models and weak interaction phe- nomenology (with D. Kumbhakar), Phys. Rev. D 28, 2215 (1983). - The K
_{L}−K_{s}mass difference in left - right symmetric models and the right handed KM matrix (with P. Basak and A. Raychaudhuri), Z. Phys. C.20 305 (1983). - Quark masses from q¯q potentials (with J. Dey, M. Dey and P. Ghose), Phys. Lett. B 106, 505 (1981).
- Box diagrams with nonvanishing external four momenta in gauge theories (with K. Niyogi), Phys. Rev. D 20, 2441 (1979).
- Color gluon model and - lepton couplings (with P. Ghose), Phys. Rev. D 13, 2105 (1976).
- Vector meson dominance in field theoretic models (with P. Ghose), Phys. Rev. D 9, 2465 (1974).
- Spinless meson masses in a unified gauge theory (with P. Ghose), Phys. Rev. D 10, 3476 (1974).

** Publications in Conference Proceedings **

- Probing non-universal gaugino masses: Prospects at the Tevatron, S. Chakrabarti, Amitava Datta, N.K. Mondal, Pramana 63, 1355-1357(2004).
- Working Group Report: Collider and B Physics , A. Datta and K. Sridhar, in Procs. of the Seventh Workshop on High - Energy Phenomenology (WHEPP - 7), 4 - 15 January 2002, Allahabad, India, Eds. B. Mukhopadhyaya and R. M. Godbole, Pramana 60, 363, 2003.
- B Physics and Collider Physics: Working group Report, A. Datta, B. Mukhopadhyaya and S. Raychaudhuri in the Procs. of the 5th Workshop on High - Energy Phenomenology (WHEPP - 5), 12 - 26 January 1998, Pune, India, Eds. R. Gavai and R. M. Godbole,Pramana 51, 287, 1998.
- Collider signatures beyond the standard model, invited talk presented at the XI DAE sympossium, Santiniketan, December 28 (1994) to January 2(1995), Published in the proceedings, Indian Journal of Physics 71(spl) 203(1997).
- VLSPs in N = 1 SUGRA Models, A. Datta, M. Guchhait and M. Drees, in the Procs. of the 3rd Workshop on High - Energy Phenomenology (WHEPP - 3), 10 - 22 January 1994, Madras, India, Ed. S. Umasankar, Pramana 45, S367 (1995).
- The Indirect Search For New Physics (Working Group Summary) in "Phenomenology of the Standard Model and Beyond" Proc. of the Workshop on High Energy Physics Phenomenology ( Eds D. P. Roy and Probir Roy, World Scientific, Singapore, 1989) p 559-577.
- Rare weak processes and bounds on new masses and mass scales (invited talk), in Procs. of the VII DAE High Energy Physics Symposium, Jammu, 1984 (Eds A.K. Raina and M.V.S.Rao, Library and Information Services, BARC, Bombay - 400 085).

** Invited Review Articles **

- CP violation in the standard model with four families, A. Datta and E. A. Paschos in "CP Violation" (an international collection of reviews) (ed. C. Jarlskog, World Scientific, Singapore, 1990).