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1.
We derive the nilpotent (anti-) BRST symmetry transformations for the Dirac (matter) fields of an interacting four (3+1)-dimensional
1-form non-Abelian gauge theory by applying the theoretical arsenal of augmented superfield formalism where (i) the horizontality
condition, and (ii) the equality of a gauge invariant quantity, on the six (4,2)-dimensional supermanifold, are exploited
together. The above supermanifold is parameterized by four bosonic spacetime coordinates xμ (with μ=0,1,2,3) and a couple of Grassmannian variables θ and θ̄. The on-shell nilpotent BRST symmetry transformations for
all the fields of the theory are derived by considering the chiral superfields on the five (4,1)-dimensional super sub-manifold
and the off-shell nilpotent symmetry transformations emerge from the consideration of the general superfields on the full
six (4,2)-dimensional supermanifold. Geometrical interpretations for all the above nilpotent symmetry transformations are
also discussed within the framework of augmented superfield formalism. 相似文献
2.
R.P. Malik 《The European Physical Journal C - Particles and Fields》2006,47(1):227-234
We derive the off-shell nilpotent (anti-)BRST symmetry transformations for the interacting U(1) gauge theory of quantum electrodynamics
(QED) in the framework of the augmented superfield approach to the BRST formalism. In addition to the horizontality condition,
we invoke another gauge invariant condition on the six (4,2)-dimensional supermanifold to obtain the exact and unique nilpotent
symmetry transformations for all the basic fields present in the (anti-)BRST invariant Lagrangian density of the physical
four (3+1)-dimensional QED. The above supermanifold is parametrized by four even space–time variables
(with μ=0,1,2,3) and two odd variables (θ and
) of the Grassmann algebra. The new gauge invariant condition on the supermanifold owes its origin to the (super) covariant
derivatives and leads to the derivation of unique nilpotent symmetry transformations for the matter fields. The geometrical
interpretations for all the above off-shell nilpotent (anti-)BRST transformations are also discussed.
PACS 11.15.-q, 12.20.-m, 03.70.+k 相似文献
3.
R.P. Malik 《The European Physical Journal C - Particles and Fields》2007,51(1):169-177
We provide an alternative to the gauge covariant horizontality condition, which is responsible for the derivation of the nilpotent (anti-) BRST symmetry transformations for
the gauge and (anti-) ghost fields of a (3+1)-dimensional (4D) interacting 1-form non-Abelian gauge theory in the framework
of the usual superfield approach to the Becchi–Rouet–Stora–Tyutin (BRST) formalism. The above covariant horizontality condition
is replaced by a gauge invariant restriction on the (4,2)-dimensional supermanifold, parameterised by a set of four spacetime coordinates, xμ(μ=0,1,2,3), and a pair of Grassmannian variables, θ and θ̄. The latter condition enables us to derive the nilpotent (anti-)
BRST symmetry transformations for all the fields of an interacting 1-form 4D non-Abelian gauge theory in which there is an explicit coupling between the gauge
field and the Dirac fields. The key differences and the striking similarities between the above two conditions are pointed
out clearly.
PACS 11.15.-q; 12.20.-m; 03.70.+k 相似文献
4.
R.P. Malik 《Annals of Physics》2003,307(1):1-40
Some of the key cohomological features of the two (1 + 1)-dimensional (2D) free Abelian- and self-interacting non-Abelian gauge theories (having no interaction with matter fields) are briefly discussed first in the language of symmetry properties of the Lagrangian densities and the same issues are subsequently addressed in the framework of superfield formulation on the four (2 + 2)-dimensional supermanifold. Special emphasis is laid on the on-shell- and off-shell nilpotent (co-)BRST symmetries that emerge after the application of (dual) horizontality conditions on the supermanifold. The (anti-)chiral superfields play a very decisive role in the derivation of the on-shell nilpotent symmetries. The study of the present superfield formulation leads to the derivation of some new symmetries for the Lagrangian density and the symmetric energy-momentum tensor. The topological nature of the above theories is captured in the framework of superfield formulation and the geometrical interpretations are provided for some of the topologically interesting quantities. 相似文献
5.
R. P. Malik 《The European Physical Journal C - Particles and Fields》2009,60(3):457-470
We derive the off-shell nilpotent Becchi–Rouet–Stora–Tyutin (BRST) and anti-BRST symmetry transformations for all the fields of a free Abelian 2-form gauge theory by exploiting the geometrical superfield approach to the BRST formalism.
The above four (3+1)-dimensional (4D) theory is considered on a (4, 2)-dimensional supermanifold parameterized by the four
even spacetime variables x
μ
(with μ=0,1,2,3) and a pair of odd Grassmannian variables θ and
(with
). One of the salient features of our present investigation is that the above nilpotent (anti-) BRST symmetry transformations
turn out to be absolutely anticommuting due to the presence of a Curci–Ferrari (CF) type of restriction. The latter condition emerges due to the application
of our present superfield formalism. The actual CF condition, as is well known, is the hallmark of a 4D non-Abelian 1-form
gauge theory. We demonstrate that our present 4D Abelian 2-form gauge theory imbibes some of the key signatures of the 4D
non-Abelian 1-form gauge theory. We briefly comment on the generalization of our superfield approach to the case of Abelian
3-form gauge theory in four, (3+1), dimensions of spacetime. 相似文献
6.
R. Kumar S. Krishna A. Shukla R. P. Malik 《The European Physical Journal C - Particles and Fields》2012,72(4):1980
Within the framework of the Becchi–Rouet–Stora–Tyutin (BRST) formalism, we demonstrate the existence of the novel off-shell
nilpotent (anti-)dual-BRST symmetries in the context of a six (5+1)-dimensional (6D) free Abelian 3-form gauge theory. Under
these local and continuous symmetry transformations, the total gauge-fixing term of the Lagrangian density remains invariant.
This observation should be contrasted with the off-shell nilpotent (anti-)BRST symmetry transformations, under which, the
total kinetic term of the theory remains invariant. The anticommutator of the above nilpotent (anti-)BRST and (anti-)dual-BRST
transformations leads to the derivation of a bosonic symmetry in the theory. There exists a discrete symmetry transformation
in the theory which provides a thread of connection between the nilpotent (anti-)BRST and (anti-)dual-BRST transformations.
This theory is endowed with a ghost-scale symmetry, too. We discuss the algebra of these symmetry transformations and show
that the structure of the algebra is reminiscent of the algebra of de Rham cohomological operators of differential geometry. 相似文献
7.
R. P. Malik 《Physics of Particles and Nuclei Letters》2011,8(3):244-250
We derive absolutely anticommuting Becchi-Rouet-Stora-Tyutin (BRST) and anti-BRST symmetry transformations for the 4D free
Abelian 2-form gauge theory by exploiting the superfield approach to BRST formalism. The antisymmetric tensor gauge field
of the above theory was christened as the “notoph” (i.e. the opposite of “photon”) gauge field by Ogievetsky and Palubarinov
way back in 1966–67. We briefly outline the problems involved in obtaining the absolute anticonimutativity of the (anti-)
BRST transformations and their resolution within the framework of geometrical superfield approach to BRST formalism. One of
the highlights of our results is the emergence of a Curci-Ferrari type of restriction in the context of 4D Abelian 2-form
(notoph) gauge theory which renders the nilpotent (anti-) BRST symmetries of the theory to be absolutely anticommutative in
nature. 相似文献
8.
We demonstrate that the nilpotent Becchi-Rouet-Stora-Tyutin (BRST) and anti-BRST symmetry invariance of the Lagrangian density
of a four (3 + 1)-dimensional (4D) non-Abelian 1-form gauge theory with Dirac fields can be captured within the framework
of the superfield approach to BRST formalism. The above 4D theory, where there is an explicit coupling between the non-Abelian
1-form gauge field and the Dirac fields, is considered on a (4,2)-dimensional supermanifold, parametrized by the bosonic 4D
spacetime variables and a pair of Grassmannian variables. We show that the Grassmannian independence of the super-Lagrangian
density, expressed in terms of the (4,2)-dimensional superfields, is a clear signature of the presence of the (anti-)BRST
invariance in the original 4D theory.
相似文献
9.
R.P. Malik 《The European Physical Journal C - Particles and Fields》2008,55(4):687-698
We discuss various symmetry properties of the Lagrangian density of a four- (3+1)-dimensional (4D) free Abelian 2-form gauge
theory within the framework of Becchi–Rouet–Stora–Tyutin (BRST) formalism. The present free Abelian gauge theory is endowed
with a Curci–Ferrari type condition, which happens to be a key signature of the 4D non-Abelian 1-form gauge theory. In fact,
it is due to the above condition that the nilpotent BRST and anti-BRST symmetries of our present theory are found to be absolutely anticommuting in nature. For the present 2-form theory, we discuss the BRST, anti-BRST, ghost and discrete symmetry properties
of the Lagrangian densities and derive the corresponding conserved charges. The algebraic structure, obeyed by the above conserved
charges, is deduced and the constraint analysis is performed with the help of physicality criteria, where the conserved and
nilpotent (anti-) BRST charges play completely independent roles. These physicality conditions lead to the derivation of the above Curci–Ferrari type restriction, within the framework
of the BRST formalism, from the constraint analysis.
PACS 11.15.-q; 12.20.-m; 03.70.+k 相似文献
10.
R. P. Malik 《Physics of Particles and Nuclei》2012,43(5):669-672
We discuss a D-dimensional Abelian 3-form gauge theory within the framework of Bonora-Tonin’s superfield formalism and derive the off-shell nilpotent and absolutely anticommuting Becchi-Rouet-Stora-Tyutin (BRST) and anti-BRST symmetry transformations for this theory. To pay our homage to Victor I. Ogievetsky (1928–1996), who was one of the inventors of Abelian 2-form (antisymmetric tensor) gauge field, we go a step further and discuss the above D-dimensional Abelian 3-form gauge theory within the framework of BRST formalism and establish that the existence of the (anti-)BRST invariant Curci-Ferrari (CF) type of restrictions is the hallmark of any arbitrary p-form gauge theory (discussed within the framework of BRST formalism). 相似文献
11.
S. Gupta R. Kumar R. P. Malik 《The European Physical Journal C - Particles and Fields》2010,70(1-2):491-502
We demonstrate the existence of the nilpotent and absolutely anticommuting Becchi–Rouet–Stora–Tyutin (BRST) and anti-BRST symmetry transformations for the four (3+1)-dimensional (4D) topologically massive Abelian U(1) gauge theory that is described by the coupled Lagrangian densities (which incorporate the celebrated (B∧F) term). The absolute anticommutativity of the (anti-) BRST symmetry transformations is ensured by the existence of a Curci–Ferrari type restriction that emerges from the superfield formalism as well as from the equations of motion which are derived from the above coupled Lagrangian densities. We show the invariance of the action from the point of view of the symmetry considerations as well as superfield formulation. We discuss, furthermore, the topological term within the framework of superfield formalism and provide the geometrical meaning of its invariance under the (anti-)BRST symmetry transformations. 相似文献
12.
A dynamical non-Abelian 2-form gauge theory (with B∧F term) is endowed with the “scalar” and “vector” gauge symmetry transformations. In our present endeavor, we exploit the latter
gauge symmetry transformations and perform the Becchi–Rouet–Stora–Tyutin (BRST) analysis of the four (3+1)-dimensional (4D)
topologically massive non-Abelian 2-form gauge theory. We demonstrate the existence of some novel features that have, hitherto,
not been observed in the context of BRST approach to 4D (non-)Abelian 1-form as well as Abelian 2-form and 3-form gauge theories.
We comment on the differences between the novel features that emerge in the BRST analysis of the “scalar” and “vector” gauge
symmetries. 相似文献
13.
Alexey S. Koshelev Sergey Yu. Vernov 《The European Physical Journal C - Particles and Fields》2012,72(10):1-14
We clearly and consistently supersymmetrize the celebrated horizontality condition to derive the off-shell nilpotent and absolutely anticommuting Becchi?CRouet?CStora?CTyutin (BRST) and anti-BRST symmetry transformations for the supersymmetric system of a free spinning relativistic particle within the framework of superfield approach to BRST formalism. For the precise determination of the proper (anti-)BRST symmetry transformations for all the bosonic and fermionic dynamical variables of our system, we consider the present theory on a (1,2)-dimensional supermanifold parameterized by an even (bosonic) variable (??) and a pair of odd (fermionic) variables ?? and $\bar{\theta}$ (with $\theta^{2} = \bar{\theta}^{2} = 0$ , $\theta\bar{\theta}+ \bar{\theta}\theta= 0$ ) of the Grassmann algebra. One of the most important and novel features of our present investigation is the derivation of (anti-)BRST invariant Curci?CFerrari type restriction which turns out to be responsible for the absolute anticommutativity of the (anti-)BRST transformations and existence of the coupled (but equivalent) Lagrangians for the present theory of a supersymmetric system. These observations are completely new results for this model. 相似文献
14.
15.
We derive the complete set of off-shell nilpotent \(\left (s^{2}_{(a)b} = 0\right )\) and absolutely anticommuting (sbsab+sabsb=0) Becchi-Rouet-Stora-Tyutin (BRST) (sb) as well as anti-BRST symmetry transformations (sab) corresponding to the combined Yang-Mills and non-Yang-Mills symmetries of the (2+1)-dimensional Jackiw-Pi model within the framework of augmented superfield formalism. The absolute anticommutativity of the (anti-)BRST symmetries is ensured by the existence of two sets of Curci-Ferrari (CF) type of conditions which emerge naturally in this formalism. The presence of CF conditions enables us to derive the coupled but equivalent Lagrangian densities. We also capture the (anti-)BRST invariance of the coupled Lagrangian densities in the superfield formalism. The derivation of the (anti-)BRST transformations of the auxiliary field ρ is one of the key findings which can neither be generated by the nilpotent (anti-)BRST charges nor by the requirements of the nilpotency and/or absolute anticommutativity of the (anti-)BRST transformations. Finally, we provide a bird’s-eye view on the role of auxiliary field for various massive models and point out few striking similarities and some glaring differences among them. 相似文献
16.
Sudhaker Upadhyay Bhabani Prasad Mandal 《The European Physical Journal C - Particles and Fields》2011,71(9):1759
We consider (1+1) dimensional theory for a single self-dual chiral boson as a classical model for gauge theory. Using the
Batalin–Fradkin–Vilkovisky (BFV) technique, the nilpotent BRST and anti-BRST symmetry transformations for this theory have
been studied. In this model other forms of nilpotent symmetry transformations like co-BRST and anti-co-BRST, which leave the
gauge-fixing part of the action invariant, are also explored. We show that the nilpotent charges for these symmetry transformations
satisfy the algebra of the de Rham cohomological operators in differential geometry. The Hodge decomposition theorem on compact
manifold is also studied in the context of conserved charges. 相似文献
17.
Mir Faizal 《理论物理通讯》2012,57(4):637-640
In this paper we will analyse the Aharony-Bergman-Jafferis-Maldacena(ABJM) theory in N = 1 superspace formalism.We then study the quantum gauge transformations for this ABJM theory in gaugeon formalism.We will also analyse the extended BRST symmetry for this ABJM theory in gaugeon formalism and show that these BRST transformations for this theory are nilpotent and this in turn leads to the unitary evolution of the S-matrix. 相似文献
18.
Saurabh Gupta R. P. Malik 《The European Physical Journal C - Particles and Fields》2010,68(1-2):325-335
We apply the superfield approach to the toy model of a rigid rotor and show the existence of the nilpotent and absolutely anticommuting Becchi–Rouet–Stora–Tyutin (BRST) and anti-BRST symmetry transformations, under which, the kinetic term and the action remain invariant. Furthermore, we also derive the off-shell nilpotent and absolutely anticommuting (anti-) co-BRST symmetry transformations, under which, the gauge-fixing term and the Lagrangian remain invariant. The anticommutator of the above nilpotent symmetry transformations leads to the derivation of a bosonic symmetry transformation, under which, the ghost terms and the action remain invariant. Together, the above transformations (and their corresponding generators) respect an algebra that turns out to be a physical realization of the algebra obeyed by the de Rham cohomological operators of differential geometry. Thus, our present model is a toy model for the Hodge theory. 相似文献
19.
In this paper the novel features of Yokoyama gaugeon formalism are stressed out for the theory of perturbative quantum gravity in the Einstein curved spacetime. The quantum gauge transformations for the theory of perturbative gravity are demonstrated in the framework of gaugeon formalism. These quantum gauge transformations lead to renormalised gauge parameter. Further, we analyse the BRST symmetric gaugeon formalism which embeds more acceptable Kugo–Ojima subsidiary condition. Further, the BRST symmetry is made finite and field-dependent. Remarkably, the Jacobian of path integral under finite and field-dependent BRST symmetry amounts to the exact gaugeon action in the effective theory of perturbative quantum gravity. 相似文献
20.
Sudhaker Upadhyay Biswajit Paul 《The European Physical Journal C - Particles and Fields》2016,76(7):394
The Einstein–Hilbert action in the context of higher derivative theories is considered for finding their BRST symmetries. Being a constraint system, the model is transformed in the minisuperspace language with the FRLW background and the gauge symmetries are explored. Exploiting the first order formalism developed by Banerjee et al. the diffeomorphism symmetry is extracted. From the general form of the gauge transformations of the field, the analogous BRST transformations are calculated. The effective Lagrangian is constructed by considering two gauge-fixing conditions. Further, the BRST (conserved) charge is computed, which plays an important role in defining the physical states from the total Hilbert space of states. The finite field-dependent BRST formulation is also studied in this context where the Jacobian for the functional measure is illustrated specifically. 相似文献