WI: Shah Pahlavi assasinated in 1949

In 1949 there was an assassination attempt made on Mohammad Reza Shah Pahlavi, which was ultimately blamed on the Communist Tudeh Party, leading to their being banned. What would have happened if Pahlavi had been killed, who would have inherited the throne, and what effect would this have on the dynamics of the 1953 coup?
 
FWIW, one source states,

"The Pahlavi regime’s claim that in 1949 there was an “attempt” on the life of the shah – after which the Tudeh was banned, repression was reinforced, and the Constitution was appended under anti-democratic conditions to increase the autocratic power of the shah – has never been questioned. In a detailed study of this issue I have, on the bases of irrefutable archival documents, demonstrated that the “attempt” was fake and stage-managed by the royal court in order to re-establish Reza Shah’s autocracy. See C. Chaqueri, The Shah’s first coup d’état,1949 (forthcoming)." http://monderusse.revues.org/22?file=1

Unfortunately, I have not been able to find the "forthcoming" work online, and do not know what his evidence is for its thesis, but Chaqueri does seem to be a respectable historian, not a crackpot, being the editor of a Harvard Middle Eastern Monograph on *The Armenians of Iran* and author of *The Soviet Socialist Republic of Iran, 1920-1921* (Pittsburgh University Press 1994).
 
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