Is the Bootstrap Model Still Viable in Modern Particle Physics?

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The discussion highlights significant issues with Chew's bootstrap model, particularly its inability to explain certain particles, such as the psi particle, while quarks fit within its framework. Although Quantum Chromodynamics (QCD) is recognized as the correct theory for strong interactions, elements of the bootstrap model have influenced string theory. The S-matrix component of the bootstrap retains some valuable aspects for modern physics. Notably, Chew's students, including Schwartz and Gross, contributed to the early development of both QCD and string theories, which evolved from bootstrap concepts. Overall, while the bootstrap model faces challenges, its legacy continues to impact contemporary theoretical physics.
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What are some of the problems with Chew's bootstrap model? Is it still a theory to be recognized and seriously considered?
 
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Although QCD, not bootstrap, is the correct theory of strong interactions, according to John Schwarz, ideas behind the bootstrap have found their way into string theory. http://arxiv.org/abs/hep-th/0007118
 
The problem with the bootstrap is that there are known particles that can't be explained by the bootstrap (the psi discovery particularly), but quarks seem to work. The S-matrix part of the bootstrap still has useful aspects. Chew students (Schwartz and Gross) were part of the early development of QCD and String Theories, some of which were outgrowths of bootstrap S-matrix and Regge stuff.
 

Thread 'Two equivalent statements of time reversal symmetric Hamiltonian'

Time reversal invariant Hamiltonians must satisfy ##[H,\Theta]=0## where ##\Theta## is time reversal operator. However, in some texts (for example see Many-body Quantum Theory in Condensed Matter Physics an introduction, HENRIK BRUUS and KARSTEN FLENSBERG, Corrected version: 14 January 2016, section 7.1.4) the time reversal invariant condition is introduced as ##H=H^*##. How these two conditions are identical?
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