Difference between revisions of "Master student Projects"

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=== Master projects in the Nikhef B-physics group ===
 
=== Master projects in the Nikhef B-physics group ===
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! style="background:#3399ff;" | <font color=#ffffff> 1) Title </font>
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'''Supervisor''' : S.Taff (staff)
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'''Research Description:'''
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Abstract
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''' Relevant information: '''
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[1]  [https://arxiv.org/abs/1507.03414 arXiv:1507.03414] (thesis or paper)
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! style="background:#3399ff;" | <font color=#ffffff> 1) Measurement of delta md </font>
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'''Supervisor''' : Niels Tuning (staff), Emmy Gabriel (postdoc), Michele Veronesi (PhD)
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'''Research Description:'''
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The decay B0->D-pi+ is very abundant in LHCb, and therefore ideal to study the oscillation frequency
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delta md, with which B0 mesons oscillate into anti-B0 mesons, and vice versa.
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This process proceeds through a so-called box diagram which might hide new yet-undiscovered particles.
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Recently, it has been realized that value of delta md is in tension with the valu of CKM-angle gamma,
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triggering renewed interest in this measurement.
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Our group at Nikhef has 10 years experience in the analysis of B->Dh decays.
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This analysis may lead to a publication on behalf of the LHCb collaboration.
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''' Relevant information: '''
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[1] [https://arxiv.org/abs/1812.06963 arXiv:1812.06963] M. Blanke, A. Buras, Emerging delta md Anomaly from Tree-Level Determinations of |Vcb| and the angle gamma
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[2] [https://arxiv.org/abs/1911.07856 arXiv:1911.07856] D. King, A. Lenz, Th. Rauh, |Vcb| and gamma from mixing
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[3] [https://indico.nikhef.nl/event/1379/contribution/1/material/slides/0.pdf talk] N. Tuning, CKM unitarity and B mixing
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[4]  [https://arxiv.org/abs/1210.6750 arXiv:1210.6750] LHCb coll.,
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[5] [https://arxiv.org/abs/1805.03448 arXiv:1805.03448] LHCb coll.,
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{| border="1" cellpadding="2" cellspacing="0"
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! style="background:#3399ff;" | <font color=#ffffff> 2) Searching for CPT violation </font>
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|}
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'''Supervisor''' : Niels Tuning (staff), Emmy Gabriel (postdoc), Michele Veronesi (PhD)
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'''Research Description:'''
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CPT symmetry is closely linked to Lorentz symmetry, and any violation
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would revolutionize science. There are possibilities though that supergravity could
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cause CPT violating effects in the system of neutral mesons.
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The precise study of B0s oscillations in the abundant Bs->Dspi decays can
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give the most stringent limits on Im(z) to date.
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Our group at Nikhef has 10 years experience in the analysis of B->Dh decays.
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This analysis may lead to a publication on behalf of the LHCb collaboration.
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''' Relevant information: '''
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[1]  [https://arxiv.org/abs/1603.04804 arXiv:1603.04804] LHCb coll.,
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Search for violations of Lorentz invariance and CPT symmetry in B0(s) mixing
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[2] [https://arxiv.org/abs/1407.1269 arXiv:1407.1269] J. van Tilburg and M. van Veghel,
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Status and prospects for CPT and Lorentz invariance violation searches in neutral meson mixing
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{| border="1" cellpadding="2" cellspacing="0"
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|-
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! style="background:#3399ff;" | <font color=#ffffff> 3) BR(B0->D-pi+) and fd/fu with B+->D0pi+ </font>
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|}
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'''Supervisor''' : Niels Tuning (staff), Emmy Gabriel (postdoc), Michele Veronesi (PhD)
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'''Research Description:'''
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The abundant decay B0->D-pi+ is often used as normalization channel, given its
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clean signal, and well-known branching fraction, as measured by the B-factories.
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However, this branching fraction can be determined more precisely, when comparing
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to the decay B+->D0pi+ , which has a twice better precision.
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In addition, the production of B0 and B+ mesons is often assumed to be equal,
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based on isospin symmetry. The study of B+->D0pi+ and B0->D-pi+ allows for the
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first measurement of this ratio, fd/fu.
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Our group at Nikhef has 10 years experience in the analysis of B->Dh decays.
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This analysis may lead to a publication on behalf of the LHCb collaboration.
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''' Relevant information: '''
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[1]  [https://cds.cern.ch/record/2636716/files/CERN-THESIS-2018-137.pdf CERN-THESIS-2018-137] J. Butter,
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Branching fraction measurement of B0->D+s pi?
  
  
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! style="background:#3399ff;" | <font color=#ffffff> 1) Searches for new pentaquarks </font>
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! style="background:#3399ff;" | <font color=#ffffff> 5) Searches for new pentaquarks </font>
 
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{| border="1" cellpadding="2" cellspacing="0"
 
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! style="background:#3399ff;" | <font color=#ffffff> 9) Measurement of the relative efficiency of muons and electrons with J/psi->ll decays </font>
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! style="background:#3399ff;" | <font color=#ffffff> 6) Measurement of the relative efficiency of muons and electrons with J/psi->ll decays </font>
 
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! style="background:#3399ff;" | <font color=#ffffff> 10) Very rare decays of B mesons</font>
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! style="background:#3399ff;" | <font color=#ffffff> 7) Very rare decays of B mesons</font>
 
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{| border="1" cellpadding="2" cellspacing="0"
 
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! style="background:#3399ff;" | <font color=#ffffff> 11) Measurement of Central Exclusive Production Rates of Chi_c using converted photons in LHCb. </font>
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! style="background:#3399ff;" | <font color=#ffffff> 8) Measurement of Central Exclusive Production Rates of Chi_c using converted photons in LHCb. </font>
 
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! style="background:#3399ff;" | <font color=#ffffff> 12) Optimization studies for Vertex detector at the High Lumi LHCb </font>
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! style="background:#3399ff;" | <font color=#ffffff> 9) Optimization studies for Vertex detector at the High Lumi LHCb </font>
 
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{| border="1" cellpadding="2" cellspacing="0"
 
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! style="background:#3399ff;" | <font color=#ffffff> 13) Measurement of charge multiplication in heavily irradiated sensors </font>
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! style="background:#3399ff;" | <font color=#ffffff> 10) Measurement of charge multiplication in heavily irradiated sensors </font>
 
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Revision as of 11:15, 6 May 2020

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